For a limited time, an online retail store is offering a free beach bag and towel with every purchase of a bathing suit over $50. The beach towel and bag are normally $20 each, so customers are really getting a bargain. The retail store is using _______ to encourage consumers to buy its products.
A. rebates
B. premiums
C. point-of-purchase displays
D. specialty advertising
E. trade promotions
Answer: B. premiums