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 y exceeds x by 25 %, then x is less than y by ?
Options: a. 28 %, b. 21 %, c. 20 %, d. 30 %, e. 29 %
Example Output: c

Example Input: Problem: p has $ 32 more than what q and r together would have had if both b and c had 1 / 6 of what p has. how much does p have ?
Options: a. $ 44, b. $ 48, c. $ 52, d. $ 56, e. $ 60
Example Output: b

Example Input: Problem: the average salary of 20 people in the shipping department at a certain firm is $ 1000. the salary of 10 of the employees is $ 600 each and the salary of 6 of the employees is $ 200 each. what is the average salary of the remaining employees ?
Options: a. $ 2500, b. $ 3200, c. $ 4500, d. $ 5000, e. $ 5200
Example Output:
b