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: Look at this series: 15, 15, 27, 27, 39, 39, 51, 51, 63, 63, ? ... What number should fill the blank?

 Option A: 51

 Option B: 39

 Option C: 75

 Option D: 15

 Option E: None
Example Output: Option C

Example Input: Question: How many positive integers G less than 10,000 are such that the product of their digits is 210?

 Option A: 24

 Option B: 30

 Option C: 48

 Option D: 54

 Option E: 72
Example Output: Option D

Example Input: Question: Set M contains number that satisfy the condition that, if integer x is in the set then x + 6 will also be in the set M. If -4 is one value in the set, which of the following values must also be present in the set M? I) -10 II) 2 III) 8

 Option A: I only

 Option B: II only

 Option C: I and II only

 Option D: II and III only

 Option E: I, II and III
Example Output:
Option D