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 it is assumed that 60 percent of those who receive a questionnaire by mail will respond and 900 responses are needed , what is the minimum number of questionnaires that should be mailed ? 
Options: a ) 1300 , b ) 1350 , c ) 1400 , d ) 1450 , e ) 1500

Ex Output:
e


Ex Input:
Problem: what profit percent is made by selling an article at a certain price , if by selling at 1 / 3 rd of that price , there would be a loss of 20 % ? 
Options: a ) 140 % , b ) 29 % , c ) 70 % , d ) 27 % , e ) 28 %

Ex Output:
a


Ex Input:
Problem: a shopkeeper buys mangoes at the rate of 6 a rupee and sells them at 5 a rupee . find his net profit or loss percent ? 
Options: a ) 34 % , b ) 33 % , c ) 20 % , d ) 35 % , e ) 30 %

Ex Output:

c