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 Q]: Question: There are 4 boys and 3 girls seated in a row.Find the probability that all girls are together?

Option A: 1/6

Option B: 1/7

Option C: 2/7

Option D: 3/7

Option E: 4/7
[EX A]: Option B

[EX Q]: Question: If the average (arithmetic mean) of x, x + 2, and x + 4 is 33, what is the value of x?

Option A: 30

Option B: 31

Option C: 32

Option D: 32

Option E: 37
[EX A]: Option B

[EX Q]: 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
[EX A]:
Option D