A store normally sells each of its DVDs for \$20. At a sale, Phyllis buys two DVDs at the regular price and gets a third DVD for half price. This is the same rate of discount as getting
Answer Choices
A. 2 for the price of 1
B. 3 for the price of 2
C. 4 for the price of 3
D. 5 for the price of 4
E. 6 for the price of 5