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 33 % of the votes polled and he lost to his rival by 833 votes . how many votes were cast ? 
Options: a ) 2250 , b ) 2450 , c ) 2650 , d ) 2850 , e ) 3050
Example Output: b

Example Input: Problem: on a sum of money , the simple interest for 2 years is rs . 324 , while the compound interest is rs . 340 , the rate of interest being the same in both the cases . the rate of interest is 
Options: a ) 15 % , b ) 14.25 % , c ) 9.87 % , d ) 10.5 % , e ) 11.5 %
Example Output: c

Example Input: Problem: a shopkeeper sold an article at $ 1170 and gained a 20 % profit . what was the cost price ? 
Options: a ) $ 950 , b ) $ 975 , c ) $ 1000 , d ) $ 1025 , e ) $ 1050
Example Output:
b