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.

Input: Consider Input: Question: For positive integers x and z, which of the following can be written as z^2?

 Option A: x^2+1

 Option B: x^2-1

 Option C: x^2-24

 Option D: x^2+11

 Option E: x^2-11

Output: Option D


Input: Consider 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

Output: Option A


Input: Consider Input: Question: Set A = {1, 2, 3, 4, 5, 6, q}
Which of the following possible values for q would cause Set A to have the smallest standard deviation?

 Option A:  1

 Option B:  2.5

 Option C:  3

 Option D:  3.5

 Option E:  7


Output: Option D