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 reduction of 50 % in the price of apples would enable a man to obtain 50 more for rs . 50 , what is reduced price per dozen ? 
Options: a ) 1 , b ) 3 , c ) 6 , d ) 7 , e ) 10
Example Output: c

Example Input: Problem: what percent of 120 are 90 ? 
Options: a ) 25 % , b ) 50 % , c ) 75 % , d ) 33 % , e ) 30 %
Example Output: c

Example Input: Problem: if the annual increase in the population of a town is 10 % and the present number of people is 11000 , what will the population be in 2 years ? 
Options: a ) 12100 , b ) 15240 , c ) 12456 , d ) 11452 , e ) 13310
Example Output:
e