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: Pipe A can fill a tank in 16 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes?

 Option A: 20

 Option B: 16

 Option C: 24

 Option D: 28

 Option E: 21
Example Output: Option E

Example Input: Question: The radius of a cylinder is 8 m, height 14 m. The volume of the cylinder is:

 Option A: 2816

 Option B: 5500

 Option C: 3300

 Option D: 1100

 Option E: 4400
Example Output: Option A

Example Input: Question: A positive whole number has factors of 2 and 4. The number MUST be divisible by: I. 16 II. 8 III. 4

 Option A: I & II

 Option B: II & III

 Option C: III

 Option D: I

 Option E: II
Example Output:
Option D