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

Input: Consider Input: Problem: approximately how many cubic feet of water are needed to fill a circular swimming pool that is 70 feet across and 9 feet deep ? 
Options: ['a ) 4000', 'b ) 10000', 'c ) 20000', 'd ) 35000', 'e ) 45000']

Output: d


Input: Consider Input: Problem: the edges of cuboid are 4 cm ; 5 cm and 6 cm . find its surface area ? 
Options: ['a ) 228', 'b ) 148', 'c ) 992', 'd ) 772', 'e ) 222']

Output: b


Input: Consider Input: Problem: if y is the smallest positive integer such that 8,820 multiplied by y is the square of an integer , then y must be 
Options: a ) 2 , b ) 5 , c ) 6 , d ) 7 , e ) 14


Output: b