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'.

Example Input: Problem: if 36 men can do a piece of work in 25 hours , in how many hours will 12 men do it ?
Options: a ) 22 , b ) 38 , c ) 60 , d ) 88 , e ) 75
Example Output: e

Example 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
Example Output: c

Example Input: Problem: a train running at the speed of 6 km / hr crosses a pole in 2 seconds . find the length of the train ?
Options: a ) 150 , b ) 872 , c ) 3.33 , d ) 3.21 , e ) 30.1
Example Output:
c