Task: Question Answering
Input (English): Question: It takes 40 identical printing presses 15 hours to print 500,000 papers. How many hours would it take 30 of these printing presses to print 500,000 papers?

 Option A: 16

 Option B: 18

 Option C: 20

 Option D: 21

 Option E: 24
Output (English): Option C