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: There are 9 executives, including the CEO and CFO, that are asked to form a small team of 5 members. However, the CEO and CFO may not both be assigned to the team. Given this constraint, how many ways are there to form the team?

 Option A: 85

 Option B: 87

 Option C: 89

 Option D: 91

 Option E: 93
Example Output: Option D

Example Input: Question: Three candidates contested in an election and received 6136, 7636, 11628 votes respectively. What is the percentage of the total votes did the winning candidate get?

 Option A: 46%

 Option B: 49%

 Option C: 57%

 Option D: 51%

 Option E: 62%
Example Output: Option A

Example Input: Question: If S is the product of all positive integers less than 31, than what is the greatest integer k for which S/18^k is an integer?

 Option A: 3

 Option B: 6

 Option C: 7

 Option D: 14

 Option E: 26
Example Output:
Option C