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: michelle deposited a certain sum of money in a savings account on july 1 st , 2007 . she earns an 12 % interest compounded semiannually . the sum of money in the account on december 31 st , 2009 is approximately what percent of the initial deposit ? 
Options: a ) 117 % , b ) 120 % , c ) 121 % , d ) 133 % , e ) 140 %
Example Output: d

Example Input: Problem: alex takes a loan of $ 4,000 to buy a used truck at the rate of 6 % simple interest . calculate the annual interest to be paid for the loan amount . 
Options: a ) 680 , b ) 700 , c ) 240 , d ) 620 , e ) 260
Example Output: c

Example Input: Problem: at what rate percent on simple interest will rs . 750 amount to rs . 1125 in 5 years ? 
Options: a ) 2 , b ) 10 , c ) 4 , d ) 5 , e ) 6
Example Output:
b