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: company p had 15 percent more employees in december than it had in january . if company p had 480 employees in december , how many employees did it have in january ?
Options: a ) 391 , b ) 417 , c ) 410 , d ) 423 , e ) 445
Example Output: b

Example Input: Problem: find the compound interest on $ 800 for 1 year at 10 % p . a . if ci is component yearly ?
Options: a ) $ 40 , b ) $ 400 , c ) $ 840 , d ) $ 800 , e ) $ 80
Example Output: a

Example Input: Problem: arun purchased 30 kg of wheat at the rate of rs . 11.50 per kg and 20 kg of wheat at the rate of 14.25 per kg . he mixed the two and sold the mixture . approximately what price per kg should be sell the mixture to make 20 % profit ?
Options: a ) 15.12 , b ) 16.33 , c ) 16.35 , d ) 16.3 , e ) 16.32
Example Output:
a