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 number exceeds 20 % of itself by 40 . the number is ? 
Options: a ) 50 , b ) 60 , c ) 80 , d ) 320 , e ) none

Output: a


Input: Consider Input: Problem: an escalator moves towards the top level at the rate of 7 ft . sec and its length is 180 feet . if a person walks on the moving escalator at the rate of 2 feet per second towards the top level , how much time does he take to cover the entire length . 
Options: a ) 5 sec , b ) 25 sec , c ) 20 sec , d ) 15 sec , e ) 10 sec

Output: c


Input: Consider Input: Problem: a group of students was interviewed for that if it was asked whether or not they speak french and / or english . among those who speak french , 10 speak english well , while 40 of them do not speak english . if 75 % of students do not speak french , how many students were surveyed ? 
Options: a ) 210 , b ) 225 , c ) 200 , d ) 250 , e ) 300


Output: c


