- PowerScore Staff
- Posts: 8950
- Joined: Feb 02, 2011
- Fri May 19, 2017 3:37 pm
#35121
Complete Question Explanation
Must Be True—CE. The correct answer choice is (E)
Your task in this Must Be True question is to select the answer choice that contains either a
restatement of one of the facts in the stimulus, or an inference permissible from a combination of the
facts.
Fact: the calm, shallow waters of coastal estuaries are easily polluted by nutrientrich
sewage
Fact: when estuary waters become overnutrified by the sewage, algae proliferate
Fact: abundant algae (i.e., when algae proliferate), in turn, sometimes provide a rich
food source for microorganisms that are toxic to fish, killing most of the fish
in the estuary
Your prephrase is that an inference supported by this fact set is that if a coastal estuary is polluted
by nutrient-rich sewage, most of the fish in the estuary may be killed as a result. The correct answer
likely will test you on this inference, though it may instead test you on a restatement of any fact in
the stimulus.
The incorrect answers will contain information that is not supported by the stimulus.
Answer choice (A): This stimulus did not mention the comparative likelihood of fish death resulting
from various types of pollution.
Answer choice (B): While the stimulus stated that the abundant algae provide a rich food source for
this microorganisms, the facts do not support the inference that they reproduce more quickly than
other types of microorganisms.
Answer choice (C): This answer choice is improperly restrictive. Citing one source of harm to the
fish without mentioning others does not preclude the existence of other threats to the fish.
Answer choice (D): This is a Mistaken Reversal of the conditional relationship provided in the
second sentence of the stimulus.
Answer choice (E): This is the correct answer choice. This answer reflects the inference
permissible from a combination of the facts in the stimulus, discussed above.
Must Be True—CE. The correct answer choice is (E)
Your task in this Must Be True question is to select the answer choice that contains either a
restatement of one of the facts in the stimulus, or an inference permissible from a combination of the
facts.
Fact: the calm, shallow waters of coastal estuaries are easily polluted by nutrientrich sewage Fact: when estuary waters become overnutrified by the sewage, algae proliferate Fact: abundant algae (i.e., when algae proliferate), in turn, sometimes provide a rich food source for microorganisms that are toxic to fish, killing most of the fish in the estuaryYour prephrase is that an inference supported by this fact set is that if a coastal estuary is polluted
by nutrient-rich sewage, most of the fish in the estuary may be killed as a result. The correct answer
likely will test you on this inference, though it may instead test you on a restatement of any fact in
the stimulus.
The incorrect answers will contain information that is not supported by the stimulus.
Answer choice (A): This stimulus did not mention the comparative likelihood of fish death resulting
from various types of pollution.
Answer choice (B): While the stimulus stated that the abundant algae provide a rich food source for
this microorganisms, the facts do not support the inference that they reproduce more quickly than
other types of microorganisms.
Answer choice (C): This answer choice is improperly restrictive. Citing one source of harm to the
fish without mentioning others does not preclude the existence of other threats to the fish.
Answer choice (D): This is a Mistaken Reversal of the conditional relationship provided in the
second sentence of the stimulus.
Answer choice (E): This is the correct answer choice. This answer reflects the inference
permissible from a combination of the facts in the stimulus, discussed above.
