- Thu Oct 25, 2018 1:57 pm
#59820
The second sentence of the stimulus is there as evidence to support the idea that campaign ads could not have been intended to serve their normal purpose, which was described in the first sentence. "It's usually for this reason (first sentence), but not this time (second sentence)." That information - that they could not have been meant to serve the usual purpose - is intended to support that the conclusion that the ads were being used this time for a different purpose - testing their potential.
Answer B cannot be the main conclusion, because it isn't a conclusion at all! There is no evidence, aside from that sentence, that too few ads were sent out to serve the usual purpose. A conclusion is not a conclusion unless there is at least one premise to support it, and a claim made with no supporting evidence is just a premise (or in this case, a counter-premise - evidence against something).
Look for the ways in which each claim supports, or gets support, from the other claims, and that's how you will determine what is a premise, what is a conclusion, and what is neither (like background info, or something nonessential, etc.)
Adam M. Tyson
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