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: a candidate got 35 % of the votes polled and he lost to his rival by 2340 votes . how many votes were cast ? 
Options: a ) 7500 , b ) 3388 , c ) 2665 , d ) 7800 , e ) 2661
Example Output: d

Example Input: Problem: there were two candidates in an election . winner candidate received 62 % of votes and won the election by 384 votes . find the number of votes casted to the winning candidate ? 
Options: a ) 288 , b ) 744 , c ) 992 , d ) 298 , e ) 177
Example Output: c

Example Input: Problem: simple interest on a certain sum at a certain annual rate of interest is 1 / 25 of the sum . if the numbers representing rate percent and time in years be equal , then the rate of interest is : 
Options: a ) 5 % , b ) 2 % , c ) 6 % , d ) 8 % , e ) 3 %
Example Output:
b