When we contrast futures with options contracts, we can say that: A. in a futures contract, the buyer and seller have asymmetric rights, whereas in an options contract the buyer and writer have symmetric rights. B. in a futures contract the buyer and seller have symmetric rights, whereas in an options contract the buyer and writer have asymmetric rights. C. for both futures contracts and options contracts the buyer and writer have symmetric rights. D. for both futures contracts and options contracts the buyer and writer have asymmetric rights.