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.

Ex Input:
Problem: when a certain number x is divided by 61, the remainder is 24. what is the remainder when x is divided by 5 ?
Options: a. 2, b. 3, c. 4, d. 5, e. 6

Ex Output:
c


Ex Input:
Problem: a bag contains 10 red jellybeans and 10 blue jellybeans. if 3 jellybeans are removed one at a time, at random and are not replaced, what is the probability e that all 3 jellybeans removed from the bag are blue ?
Options: a. 9 / 100, b. 2 / 19, c. 1 / 8, d. 3 / 20, e. 3 / 10

Ex Output:
b


Ex Input:
Problem: running at the same constant rate, 6 identical machines can produce a total of 240 bottles per minute. at this rate, how many bottles could 10 such machines produce in 4 minutes ?
Options: a. 648, b. 1,800, c. 1,600, d. 10,800, e. 64,800

Ex Output:

c