During colonial times in America, juries were encouraged to ask questions of the parties in the courtroom. The jurors were, in fact, expected to investigate the facts of the case themselves. If jurors conducted an investigation today, we would throw out the case.
This paragraph best supports the statement that

The paragraph focuses on the idea that the jury system is different from what it was in colonial times. There is no support given for choices a, b, and c. Choice d is incorrect because, even though jurors in colonial times were expected to investigate and ask questions, this does not necessarily mean that they were more informed than today's jurors.