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'.

Input: Consider Input: Problem: a bowl was filled with 10 ounces of water , and 0.014 ounce of the water evaporated each day during a 50 - day period . what percent of the original amount of water evaporated during this period ? 
Options: a ) 0.004 % , b ) 0.04 % , c ) 0.40 % , d ) 7 % , e ) 40 %

Output: d


Input: Consider Input: Problem: i gain 70 paise on rs . 70 . my gain percent is : 
Options: a ) 0.1 % , b ) 1 % , c ) 7 % , d ) 10 % , e ) noneof these

Output: b


Input: Consider Input: Problem: the population of a town is 8100 . it decreases annually at the rate of 10 % p . a . what was its population 2 years ago ? 
Options: a ) 9000 , b ) 8000 , c ) 8500 , d ) 9500 , e ) 10000


Output: e