Pick the single correct statement below:

a$.$ If you have a long position in a forward contract, your profit decreases with the price of the underlying asset.

b$.$ The cost into entering into a long position in a new forward contract is higher than the cost of a call option.

c$.$ Future contracts bear more credit risk than forward contracts.

d$.$ If you have a short position in a futures contract, your profit decreases with the price of the underlying asset.