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

Ex Input:
Problem: a circular well with a diameter of 2 meters , is dug to a depth of 14 meters . what is the volume of the earth dug out . 
Options: ['a ) 40 m 3', 'b ) 42 m 3', 'c ) 44 m 3', 'd ) 46 m 3', 'e ) none of these']

Ex Output:
c


Ex Input:
Problem: the area of the maximum size of the circle described from the 10 inch square ? 
Options: ['a ) 75.5 sq inch', 'b ) 76.5 sq inch', 'c ) 77.5 sq inch', 'd ) 78.5 sq inch', 'e ) 79.5 sq inch']

Ex Output:
d


Ex Input:
Problem: the number 149 can be written as the sum of the squares of 3 different positive integers . what is the sum of these 3 integers ? 
Options: a ) 19 , b ) 16 , c ) 15 , d ) 14 , e ) 13

Ex Output:

a