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: yesterday ' s closing prices of 1,980 different stocks listed on a certain stock exchange were all different from today ' s closing prices . the number of stocks that closed at a higher price today than yesterday was 20 percent greater than the number that closed at a lower price . how many of the stocks closed at a higher price today than yesterday ? 
Options: a ) 484 , b ) 1080 , c ) 1,100 , d ) 1,320 , e ) 1,694
Example Output: b

Example Input: Problem: a bowl of fruit contains 14 apples and 20 oranges . how many oranges must be removed so that 70 % of the pieces of fruit in the bowl will be apples ? 
Options: a ) 3 , b ) 6 , c ) 14 , d ) 17 , e ) 20
Example Output: c

Example Input: Problem: 30 is subtracted from 40 % of a number , the result is 50 . find the number ? 
Options: a ) 200 , b ) 997 , c ) 266 , d ) 288 , e ) 271
Example Output:
a