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: If 5 ministers are to be seated at a round table conference, then how many different ways can they be seated?

 Option A: 240

 Option B: 60

 Option C: 24

 Option D: 720

 Option E: 180
Example Output: Option C

Example Input: Question: Evaluate combination
100C98=100!/(98)!(2)!

 Option A: 4950

 Option B: 1510

 Option C: 4170

 Option D: 3170

 Option E: None of these
Example Output: Option A

Example Input: Question: A decade is defined as a complete set of consecutive nonnegative integers that have identical digits in identical places, except for their units digits, with the first decade consisting of the smallest integers that meet the criteria, the second decade consisting of the next smallest integers, etc. A decade in which the prime numbers contain the same set of units digits as do the prime numbers in the second decade is the

 Option A: fifth

 Option B: seventh

 Option C: eighth

 Option D: ninth

 Option E: eleventh
Example Output:
Option E