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: 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: an escalator moves towards the top level at the rate of 12 ft . sec and its length is 160 feet . if a person walks on the moving escalator at the rate of 8 feet per second towards the top level , how much time does he take to cover the entire length . 
Options: a ) 10 sec , b ) 8 sec , c ) 9 sec , d ) 7 sec , e ) 12 sec
Example Output: b

Example Input: Problem: the difference between simple and compound interest on rs . 1700 for one year at 10 % per annum reckoned half - yearly is ? 
Options: a ) 8.25 , b ) 4.25 , c ) 9.25 , d ) 3.25 , e ) 2.25
Example Output:
b