You will be given a definition of a task first, then some input of the task.
In this task, you need to provide the correct option for a given problem on probability from the provided options.

Problem: it takes 60 identical printing machines 4 hours to print 200,000 cards . how long would it take 50 of these machines to print the same total ? 
Options: a ) 10 hr , b ) 5 hr , c ) 6 hr , d ) 4 hr 30 min , e ) 5 hr 12 min
Output:
e