Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Example Input: Problem: if 32.5 % of the 880 students at a certain college are enrolled in biology classes, how many students at the college are not enrolled in a biology class ?
Options: a. 110, b. 330, c. 550, d. 594, e. 880
Example Output: d

Example Input: Problem: what is the units digit of 26 ! + 50 ! + 4 ! + 4 ! ?
Options: a. 8, b. 6, c. 4, d. 2, e. 0
Example Output: a

Example Input: Problem: the original price of a suit is $ 160. the price increased 25 %, and after this increase, the store published a 25 % off coupon for a one - day sale. given that the consumers who used the coupon on sale day were getting 25 % off the increased price, how much did these consumers pay for the suit ?
Options: a. $ 140, b. $ 145, c. $ 150, d. $ 155, e. $ 160
Example Output:
c