What Is the Biggest Difference Between an Option and a Futures

Multiple Choice

What is the biggest difference between an option and a futures contract?

A) Options are traded on exchanges whereas futures are not
B) Options give investors a way to manage portfolio risk while futures do not
C) Options can be used by speculators to profit from price fluctuations while futures cannot
D) Options give their holders the right to buy or sell whereas futures contract are obligations to buy or sell