Answer:
Dr. King's "I have a Dream" speech was so moving because the way he conveyed the speech's message through powerful gestures and diction was inspiring
The correct answer is A.
Earlier in the chapter, Woolf writes: It was disappointing not to have brought back in the evening some important statement, some authentic <span>fact.
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Thus, she wants facts to back up her claim.
By citing a historian, Woolf is making it clear that she is basing her argument on facts. Otherwise, one might claim she is exaggerating or making up stories. Instead, she is saying that such customs were fact and considered commonplace by both "high as well as low."
You should look at web sources that have recently been updated because a lot of times new information is present that could change the original point/evidence. This could discredit the source. You also should do this because the newer the information, the more credible it is in the time (older information could easily be outdated).
B. When making an inference, you must look at non-explicit information.