Instructions: 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'.
Input: Problem: if an object travels at ten feet per second , how many feet does it travel in two hours ? 
Options: a ) 60000 , b ) 30000 , c ) 18000 , d ) 72000 , e ) 22200
Output:
d