Amie has a coupon for 1/4 off the regular price, b, of a hamburger. Which expressions represent the price of the burger using the coupon?
A. 1/4b
B. 3/4b
C. b - 1/4
D. b - 3/4
E. b - 1/4b
F. b - 3/4b
Type the correct letters of all the answers that apply.