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: a sum of money at simple interest amounts to rs . 415 in 2 years and to rs . 514 in 4 years . the sum is ? 
Options: a ) rs . 316 , b ) rs . 251 , c ) rs . 154 , d ) rs . 294 , e ) rs . 200
Example Output: a

Example Input: Problem: a shopkeeper sold an article offering a discount of 5 % and earned a profit of 23.5 % . what would have been the percentage of profit earned if no discount had been offered ? 
Options: a ) 28.5 , b ) 27.675 , c ) 30 , d ) data inadequate , e ) none of these
Example Output:
c