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: jacob is 39 years old . he is 3 times as old as his brother . how old will jacob be when he is twice as old ?
Options: a ) 63 , b ) 64 , c ) 65 , d ) 76 , e ) 67
Example Output: c

Example Input: Problem: the product of two positive integers is 1023 and their difference is 2 . what is the bigger number ?
Options: a ) 29 , b ) 31 , c ) 33 , d ) 35 , e ) 37
Example Output: c

Example Input: Problem: each child has 5 crayons and 14 apples . if there are 10 children , how many crayons are there in total ?
Options: a ) 22 , b ) 65 , c ) 12 , d ) 36 , e ) 50
Example Output:
e