David and Asher Buy the Same Pair of Sneakers,but Each

Multiple Choice

David and Asher buy the same pair of sneakers,but each in the wrong size.David proposes a size swap with Asher.This is an example of

A) ​barter,since the sneakers in the correct size represent a medium of exchange.
B) ​barter,since the sneakers in the correct size have intrinsic value to both David and Asher.
C) ​money,since the sneakers in the correct size do not have any intrinsic value.
D) money,since the sneakers in the correct size represent a medium of exchange.