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 G.C.D. of 1.08, 0.36 and 0.63 is?

 Option A: 0.03

 Option B: 0.09

 Option C: 0.18

 Option D: 0.108

 Option E: none of these

Option B