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: john and david can finish a job together in 2 hours. if john can do the job by himself in 3 hours, what percent of the job does david do ?
Options: a. 36.33 %, b. 33.33 %, c. 39.33 %, d. 40.33 %, e. 33 %
Example Output: b

Example Input: Problem: the average score of a cricketer in 2 matches is 30 and in other 3 matches is 40. then find the average score in all the 5 matches ?
Options: a. 25, b. 27, c. 30, d. 35, e. 36
Example Output: e

Example Input: Problem: 3 candidates in an election and received 3136, 7636 and 11628 votes respectively. what % of the total votes did the winning candidate got in that election ?
Options: a. 45 %, b. 49 %, c. 52 %, d. 59 %, e. 61 %
Example Output:
c