Paragraph 1 ends with the theory that witnesses may be influenced by leading questions even though those questions are not allowed/are deemed inadmissible by the judge.
Paragraph 2 CONFIRMS this by citing studies which give further details about how exactly the new information from leading questions can cement/add to witnesses' memories.
A: fits the above.
B: this is really tempting. Paragraph 2 also does show an example but it's not all it does--A is the better answer because it describes ALL of paragraph 2. Does anyone have a better explanation for why B is wrong?
C: Paragraph 2 isn't an argument; its a set of facts.
D: totally wrong.
E: There is no favoring one theory over another. This is intended to confuse those who skimmed paragraph 2 and remembered there were 2 ways witnesses respond to leading questions.