What is post-sale confusion?

Select one:

a. Post-sale confusion occurs when a consumer buys a good and is then confused about the good purchased.

b. Post-sale confusion occurs when a consumer is initially confused about the good they want to buy, but the confusion is dispelled by the time of purchase.

c. Post-sale confusion occurs when a consumer buys a good and someone else is confused about the source of the good.

d. Post-sale confusion occurs when a mark owner changes the mark applied to a good after a consumer purchases the good.