Shampoo Manufacturers Sometimes Run a Promotion in Which They Shrink-Wrap

Shampoo manufacturers sometimes run a promotion in which they shrink-wrap two plastic bottles of shampoo for the price of one.They most often use this buy-one-get-one-free tactic when they want to

A) stimulate repeat purchases and add to their loyal customer base.
B) build a better brand image and create emotional bonds with consumers.
C) introduce a new brand and gain new buyers.
D) stimulate larger purchases of a product and reduce inventory.