The Concept of Double Coincidence of Wants Refers to the Fact

The concept of double coincidence of wants refers to the fact that

A) married couples like the same goods.
B) a financial asset needs to be priced correctly to be exchanged.
C) both parties have to want what the other party has for barter to take place.
D) people can never exactly agree on an equilibrium price.
E) different people value goods differently.