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

Ex Input:
Problem: aaron will jog from home at 2 miles per hour and then walk back home by the same route at 4 miles per hour . how many miles from home can aaron jog so that he spends a total of 3 hours jogging and walking ?
Options: a ) 5 , b ) 7 , c ) 3 , d ) 9 , e ) 10

Ex Output:
c

Ex Input:
Problem: if 3 men or 4 women can do a piece of work in 16 days , in how many days can 12 men and 8 women do the same piece of work ?
Options: a ) 8 / 3 , b ) 6 , c ) 5 , d ) 4 , e ) 3

Ex Output:
a

Ex Input:
Problem: excluding stoppages , the speed of a train is 45 kmph and including stoppages it is 37 kmph . of how many minutes does the train stop per hour ?
Options: a ) 73 , b ) 83 , c ) 12 , d ) 83 , e ) 11

Ex Output:
e