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: what percent of 12.4 kg is 20 gms ? 
Options: a ) 25 , b ) 16 , c ) 18 , d ) 19 , e ) 17
Example Output: b

Example Input: Problem: from the sale of sleeping bags , a retailer made a gross profit of 14 % of the wholesale cost . if each sleeping bag was sold for $ 28 , what was the wholesale cost per bag ? 
Options: a ) 3.0 , b ) 3.36 , c ) 24.56 , d ) 25.0 , e ) 31.36
Example Output: c

Example Input: Problem: a shopkeeper sold 10 articles at the cost price of 8 articles . then find the profit % or lost % ? 
Options: a ) 10 % , b ) 15 % , c ) 25 % , d ) 30 % , e ) 20 %
Example Output:
e