In this task, you need to provide the correct option for a given problem from the provided options.

Ex Input:
Problem: if 25 % of the 880 students at a certain college are enrolled in biology classes , how many students at the college are not enrolled in a biology class ? 
Options: a ) 500 , b ) 600 , c ) 620 , d ) 640 , e ) 660

Ex Output:
e


Ex Input:
Problem: sara bought both german chocolate and swiss chocolate for some cakes she was baking . the swiss chocolate cost $ 3.6 per pound , and german chocolate cost $ 3 per pound . if the total the she spent on chocolate was $ 36 and both types of chocolate were purchased in whole number of pounds , how many total pounds of chocolate she purchased ? 
Options: a ) 7 , b ) 8 , c ) 10 , d ) 15 , e ) 36 / 3

Ex Output:
e


Ex Input:
Problem: what is the units digit of 28 ! + 50 ! + 3 ! + 4 ! ? 
Options: a ) 0 , b ) 2 , c ) 4 , d ) 6 , e ) 8

Ex Output:

a