Karma, a salesperson who works for Pristine, informs her customers that they can return garments within $30$ days of purchase for cash. However, Pristine's return policy states that customers may only exchange garments for other garments and not for cash. In this scenario, it is evident that Karma needs to improve her knowledge.

a$.$ industry

b$.$ company

C$.$ product

d$.$ promotion

e$.$ price