In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Ex Input:
Problem: the average of 6 quantities is 8 . the average of 4 of them is 5 . what is the avg . of the remaining 2 numbers ? 
Options: a ) 11 , b ) 12 , c ) 13 , d ) 14 , e ) 15

Ex Output:
d


Ex Input:
Problem: if | 5 x - 5 | = 150 , what is the sum of all the possible values of x ? 
Options: a ) 2 , b ) - 2 , c ) 6 , d ) - 3 , e ) 5

Ex Output:
a


Ex Input:
Problem: if 28 less than 5 times a certain number is 232 . what is the number ? 
Options: a ) 32 , b ) 42 , c ) 52 , d ) 62 , e ) 72

Ex Output:

c