Which of the Following Best Illustrates the Double Coincidence of Wants

Multiple Choice

Which of the following best illustrates the double coincidence of wants?

A) Both Tom and Jerry would like to purchase the same good.
B) Tom has something he's willing to trade to Jerry; Jerry has something he's willing to trade to Tom.
C) Tom and Jerry have very similar tastes; hence,Tom's wants coincide with Jerry's.
D) Tom has something he's willing to trade to Jerry,who wants it; Jerry has something he's willing to trade to Tom,who wants it.
E) Tom has something Jerry wants; Jerry has something Tom wants.