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: What is the next number of the following sequence
10, 7, 12, 10, 14, __ ?

 Option A: 13

 Option B: 14

 Option C: 15

 Option D: 16

 Option E: 17
[EX A]: Option A

[EX Q]: Question: How many odd 4-digit positive integers R that are multiples of 5 can be formed without using the digit 3?

 Option A: 648

 Option B: 729

 Option C: 900

 Option D: 1296

 Option E: 3240
[EX A]: Option A

[EX Q]: Question: In how many ways can you sit 7 people on a bench if 3 of them must sit together?

 Option A: 720

 Option B: 2,160

 Option C: 2,400

 Option D: 4,320

 Option E: 40,320
[EX A]:
Option A