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: uncle bruce is baking chocolate chip cookies . he has 36 ounces of dough ( with no chocolate ) and 10 ounces of chocolate . how much chocolate is left over if he uses all the dough but only wants the cookies to consist of 20 % chocolate ? 
Options: a ) 2 , b ) 4 , c ) 6 , d ) 3 , e ) 1
Example Output: e

Example Input: Problem: calculate the dividend from moses ' s stock , if he invested rs . 3000 at 72 to obtain an income of rs . 210 . 
Options: a ) 3 , b ) 9 , c ) 3 , d ) 4 , e ) 5.04
Example Output: e

Example Input: Problem: a invested some money in 8 % stock at 96 . if b wants to invest in an equally good 10 % stock , he must purchase a stock worth of : 
Options: a ) rs . 120 , b ) rs . 60 , c ) rs . 128 , d ) rs . 130 , e ) rs . 140
Example Output:
a