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: an article with cost price of 180 is sold at 15% profit. what is the selling price?

Option A: 198

Option B: 200

Option C: 204

Option D: 207

Option E: 210
[A]: Option D

[Q]: Question: The greatest common factor of 16 and the positive integer n is 4, and the greatest common factor of n and 45 is 3. Which of the following could be the greatest common factor of n and 210?

Option A: 3

Option B: 14

Option C: 30

Option D: 42

Option E: 70
[A]: Option D

[Q]: Question: If a sequence of 8 consecutive odd integers with increasing values has 3 as its 7th term, what is the sum of the terms of the sequence?

Option A: -16

Option B: -8

Option C: -4

Option D: 4

Option E: 8
[A]:
Option A