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: a is a working partner and b is a sleeping partner in the business . a puts in rs . 3500 and b rs . 1500 , a receives 10 % of the profit for managing the business the rest being divided in proportion of their capitals . out of a total profit of rs . 9600 , money received by a is ? 
Options: a ) 1978 , b ) 2707 , c ) 7728 , d ) 7008 , e ) 7291
Example Output: d

Example Input: Problem: a man walking at a rate of 15 km / hr crosses a bridge in 20 minutes . the length of the bridge is ? 
Options: a ) 1250 m , b ) 1110 m , c ) 950 m , d ) 1000 m , e ) 1300 m
Example Output: d

Example Input: Problem: a , b and c invested rs . 6000 , rs . 7200 and rs . 10800 respectively , in a partnership business . find the share of c in profit of rs . 19000 after a year ? 
Options: a ) 3630 , b ) 5580 , c ) 19000 , d ) 8550 , e ) 6000
Example Output:
d