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.

[Q]: Question: How many inches are in 2000 millimeters? (round your answer to the nearest hundredth of of an inch).

 Option A: 51.45 inches

 Option B: 86.09 inches

 Option C: 67.34 inches

 Option D: 34.98 inches

 Option E: 78.74 inches
[A]: Option E


[Q]: Question: Simplify: 250 x 250 - 100 x 100

 Option A: 761200

 Option B: 761400

 Option C: 52500

 Option D: 761500

 Option E: None of them
[A]: Option C


[Q]: Question: If (x + 1) times (2x + 3) is an odd integer, then x must be:

 Option A: an odd integer

 Option B: an even integer

 Option C: a prime number

 Option D: a composite number

 Option E: a negative integer
[A]:
Option B