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.

Ex Input:
Question: Anthony and Michael sit on the six member board of directors for company X. If the board is to be split up into 2 three-person subcommittees, what percent R of all the possible subcommittees that include Michael also include Anthony?

Option A: 20%

Option B: 30%

Option C: 40%

Option D: 50%

Option E: 60%

Ex Output:
Option C

Ex Input:
Question: Look at this series: -2, 0, 2, 4,... What number should come next?

Option A: 6

Option B: 12

Option C: 8

Option D: 9

Option E: 10

Ex Output:
Option A

Ex Input:
Question: The average (arithmetic mean) of y numbers is x. If 10 is added to the set of numbers, then the average will be x - 5. What is the value of y in terms of x ?

Option A: x/6 - 6

Option B: x/6 - 5

Option C: x/7 - 5

Option D: x/5 - 3

Option E: x/5 - 6

Ex Output:
Option D