You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Example Input: Question: x% of y is y% of ?

 Option A: x

 Option B: 100x

 Option C: x/100

 Option D: y/100

 Option E: None
Example Output: Option A

Example Input: Question: A man has $480 in the denominations of one-Dollar, five-Dollar notes and ten-Dollar. The number of Dollars of each denomination is equal. What is the total number of Dollar that he has ?

 Option A: 50

 Option B: 60

 Option C: 90

 Option D: 48

 Option E: 67
Example Output: Option C

Example Input: Question: Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is?

 Option A: 120 gallons

 Option B: 200 gallons

 Option C: 170 gallons

 Option D: 180 gallons

 Option E: 250 gallons
Example Output:
Option A