Hey the answer is It’s antiquated
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."
The point is third-person omniscient subjective.
You can tell because the passage states the thoughts/feelings of multiple characters, while not using "I" or "You" or any other first or second person pronouns.
Hope this helped!