In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: each child has 6 crayons and 12 apples . if there are 12 children , how many crayons are there in total ?
Options: a ) 22 , b ) 65 , c ) 72 , d ) 78 , e ) 90
Example Output: c

Example Input: Problem: 5357 x 51 = ?
Options: a ) 273232 , b ) 273243 , c ) 273247 , d ) 273250 , e ) 273207
Example Output: e

Example Input: Problem: the sum of three consecutive even numbers is 20 more than the first of these numbers . what is the middle number ?
Options: a ) 7 , b ) 9 , c ) 11 , d ) can not be determined , e ) none of these
Example Output:
b