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: the sum of 4 consecutive even numbers is 140. what would be the smallest number ?
Options: a. 32, b. 88, c. 70, d. 123, e. 12
Example Output: a

Example Input: Problem: a gardener grows cabbages in her garden that is in the shape of a square. each cabbage takes 1 square feet of area in her garden. this year, she has increased her output by 193 cabbages as compared to last year. the shape of the area used for growing the cabbages has remained a square in both these years. how many cabbages did she produce this year ?
Options: a. 8,208, b. 9,409, c. 11,424, d. 12,586, e. can not be determined
Example Output: b

Example Input: Problem: the average temperature for tuesday, wednesday and thursday was 32 c. the average temperature for wednesday, thursday and friday was 34 c. if the temperature on friday be 44 c, what was the temperature on tuesday ?
Options: a. 39 c, b. 44 c, c. 38 c, d. 42 c, e. none of these
Example Output:
c