A
A is not correct. Vanderbilt is not seen as a friend, nor is he mentioned as one. We only have this paragraph to go by. There is no friendship here.
B
Maybe. This could be the second best answer, but it is certainly not the best answer. We do not know if the writer of the biography is a historian. We cannot choose what we do not know.
C
Same reasoning as the first two. There are no quotations (misquoted or otherwise) to judge Vanderbuilt.
D
That really only leaves us with D. Money is involved in the quotation, so that much is at least true.
I would pick D.