In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: the difference between the compound interest compounded annually and simple interest for 2 years at 20 % per annum is rs . 72 . find the principal ?
Options: a ) 2277 , b ) 2667 , c ) 3600 , d ) 2766 , e ) 1800
Example Output: e

Example Input: Problem: in a recent election , geoff received 0.5 percent of the 6,000 votes cast . to win the election , a candidate needed to receive more than x % of the vote . if geoff needed exactly 3,000 more votes to win the election , what is the value of x ?
Options: a ) 50 , b ) 50.5 , c ) 56 , d ) 60 , e ) 63
Example Output: b

Example Input: Problem: a small college reduced its faculty by approximately 25 percent to 195 professors . what was the original number of faculty members ?
Options: a ) 182 , b ) 260 , c ) 224 , d ) 254 , e ) 302
Example Output:
b