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: the inside dimensions of a rectangular wooden box are 4 meters by 5 meters by 6 meters . a cylindrical drum is to be placed inside the box so that it stands upright when the closed box rests on one of its six faces . of all such drums that could be used , what is the volume , in cubic meters , of the one that has maximum volume ?
Options: ['a ) 20 ', 'b ) 24 ', 'c ) 25 ', 'd ) 96 ', 'e ) 100 ']

Ex Output:
c

Ex Input:
Problem: the area of a triangle is with base 10 m and height 5 m ?
Options: a ) 11 , b ) 25 , c ) 787 , d ) 122 , e ) 12

Ex Output:
b

Ex Input:
Problem: a football field is 8400 square yards . if 1200 pounds of fertilizer are spread evenly across the entire field , how many pounds of fertilizer were spread over an area of the field totaling 3500 square yards ?
Options: a ) 450 , b ) 600 , c ) 500 , d ) 2400 , e ) 3200

Ex Output:
c