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'.

Ex Input:
Problem: if each edge of cube increased by 10 % , the percentage increase in 
Options: a ) 21 , b ) 22 , c ) 25 , d ) 19 , e ) 15

Ex Output:
a


Ex Input:
Problem: mary works in a restaurant a maximum of 70 hours . for the first 20 hours , she is paid $ 8 per hour . for each overtime hour , she is paid at a rate which is 25 % higher than her regular rate . how much mary can earn in a week ? 
Options: a ) 600 , b ) 620 , c ) 660 , d ) 320 , e ) 400

Ex Output:
c


Ex Input:
Problem: a reduction of 35 % in the price of apples would enable a man to obtain 42 more for rs . 20 , what is reduced price per dozen ? 
Options: a ) 1.7 , b ) 3.5 , c ) 6.3 , d ) 7.1 , e ) 10.4

Ex Output:

a