The correct answer here is A.
John Jacob Astor was born in 1763 to father who was a butcher so he was not very wealthy. He amassed his fortune by trading fur through that business he became one of the most wealthy people in the United States. Astor traded sandalwood, teas and of course fur with China which turned out very profitable for him.
Rome got to big and couldnt handle rebellions and invasions
Filibuster-used to block the vote on a bill, and therefore its passage.