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 a ' s height is 40 % less than that of b, how much percent b ' s height is more than that of a ?
Options: a. 66.66 %, b. 66.68 %, c. 66.766 %, d. 86.66 %, e. 66.65 %
Example Output: a

Example Input: Problem: at the wholesale store you can buy an 8 - pack of hot dogs for $ 1.55, a 20 - pack for $ 3.05, and a 250 - pack for $ 22.95. what is the greatest number of hot dogs you can buy at this store with $ 205 ?
Options: a. 1,108, b. 2,100, c. 2,140, d. 2,124, e. 2,256
Example Output: c

Example Input: Problem: at an elementary school, 70 % of the faculty members are women and 60 % of the faculty members are married. if 2 ⁄ 3 of the men are single, what fraction of the women are married ?
Options: a. 5 ⁄ 7, b. 7 ⁄ 10, c. 1 ⁄ 3, d. 7 ⁄ 30, e. 5 ⁄ 70
Example Output:
a