Definition: 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.
Input: Question: The total age of A and B is 13 years more than the total age of B and C. C is how many year younger than A

 Option A: 11

 Option B: 12

 Option C: 13

 Option D: 14

 Option E: 15

Option C