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: uncle bruce is baking chocolate chip cookies . he has 36 ounces of dough ( with no chocolate ) and 10 ounces of chocolate . how much chocolate is left over if he uses all the dough but only wants the cookies to consist of 20 % chocolate ? 
Options: a ) 2 , b ) 4 , c ) 6 , d ) 3 , e ) 1
Example Output: e

Example Input: Problem: today joelle opened an interest - bearing savings account and deposited $ 5,000 . if the annual interest rate is 5 percent compounded interest , and she neither deposits nor withdraws money for exactly 2 years , how much money will she have in the account ? 
Options: a ) $ 6512.50 , b ) $ 7512.50 , c ) $ 5512.50 , d ) $ 4512.50 , e ) $ 5250.00
Example Output: c

Example Input: Problem: if the selling price of 8 articles is same as the cost price of 12 articles . find the gain or loss percentage ? 
Options: a ) 30 % gain , b ) 30 % loss , c ) 50 % gain , d ) 50 % loss , e ) 60 % loss
Example Output:
c