The part where Zaroff tried to include Rainsford in his sick hunting game would be the best portray Zaroff as Rainsford's foil i think.
Beside that, they both actually are very similar with one another
Answer:
for me, I think it's D
Explanation:
the black death had spread through the contact with animals, basically through fleas and other day parasites. They spread through trade.
Realistic fiction tends to have it a lot
Please give more background info so we can solve it.