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: of the votes cast on a certain proposal , 68 more were in favor of the proposal than were against it . if the number of votes against the proposal was 40 percent of the total vote , what was the total number of votes cast ? ( each vote cast was either in favor of the proposal or against it . )
Options: a ) 300 , b ) 340 , c ) 380 , d ) 420 , e ) 460

Ex Output:
b

Ex Input:
Problem: fox jeans regularly sell for $ 10 a pair and pony jeans regularly sell for $ 18 a pair . during a sale these regular unit prices are discounted at different rates so that a total of $ 9 is saved by purchasing 5 pairs of jeans : 3 pairs of fox jeans and 2 pairs of pony jeans . if the sum of the two discounts rates is 22 percent , what is the discount rate on pony jeans ?
Options: a ) 9 % , b ) 10 % , c ) 11 % , d ) 12 % , e ) 40 %

Ex Output:
e

Ex Input:
Problem: a vendor bought toffees at 6 for a rupee . how many for a rupee must he sell to gain 80 % ?
Options: a ) 10.8 , b ) 20.8 , c ) 28.8 , d ) 18.8 , e ) 17.8

Ex Output:
c