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: for what value of x between − 8 and 8 , inclusive , is the value of x ^ 2 − 10 x + 16 the greatest ? 
Options: a ) − 8 , b ) − 2 , c ) 0 , d ) 2 , e ) 8
Example Output: a

Example Input: Problem: find value for x from below equation ? x + 1 = 4 
Options: a ) - 5 , b ) - 4 , c ) 4 , d ) 3 , e ) 2
Example Output: d

Example Input: Problem: 2 ^ 8 × 39 + 31 = ? 
Options: a ) 34545 , b ) 65657 , c ) 65567 , d ) 45677 , e ) 56782
Example Output:
c