Hi Richie! Happy to help with this question
First, let's find the support for the correct answer choice, which is answer choice (E). In the first sentence of the second paragraph, the author discusses the results of "studies involving simulated trial situations," which matches the second half of answer choice (E) (which directly mentions "simulated trials"). A few sentences later, the author draws on results from psychological research, which matches the first half of answer choice (E), since psychological research would count as research not directly concerned with legal proceedings. Answer choice (E) is therefore strongly supported by the second paragraph of the passage.
Now, let's look at why answer choice (D) is incorrect. The beginning of the second paragraph says there has not been any empirical research directly testing the effectiveness of stealing thunder. Therefore, the second half of answer choice (D) ("controlled studies") is actually contradicted by the stimulus; "simulated trials" are not the same thing as "controlled studies" (a controlled study would have an intervention group and a control group, like a scientific research trial). For the first half of answer choice (D), the passage does not mention the use of techniques analogous to stealing thunder, as the psychological research discussed in the second paragraph doesn't necessarily count as the use of a "technique."
Although we can possibly stretch the information in the passage to fit answer choice (D), answer choice (E) is more clearly supported by the information in the passage. For Reading Comprehension, we always want to find the answer choice that is most clearly supported by the information in the passage without stretching the information in the passage to fit the answer choice.
I hope this helps, and let me know if you have any other questions!