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: evaluate 64 / . 08
Options: a ) 800 , b ) 500 , c ) 505 , d ) none of these , e ) 506

Ex Output:
a

Ex Input:
Problem: village p ' s population is 1200 greater than village q ' s population . if village q ' s population were reduced by 800 people , then village p ' s population would be 6 times as large as village q ' s population . what is village q ' s current population ?
Options: a ) 1050 , b ) 1100 , c ) 1150 , d ) 1200 , e ) 1250

Ex Output:
d

Ex Input:
Problem: in digging a pond 20 m * 12 m * 5 m the volumes of the soil extracted will be ?
Options: a ) 3387 , b ) 1000 , c ) 1200 , d ) 2787 , e ) 1121

Ex Output:
c