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.

Example Input: Question: 3889 + 14.952 - ? = 3854.002

 Option A: 47.95

 Option B: 49.95

 Option C: 45.97

 Option D: 47.59

 Option E: 45.79
Example Output: Option B

Example Input: Question: A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 66 km downstream?

 Option A: 30/83 hours

 Option B: 33/13 hours

 Option C: 31/13 hours

 Option D: 30/13 hours

 Option E: 30/14 hours
Example Output: Option B

Example Input: Question: A can do a work in 15 days and B in 20 days. If they work on it together for 5 days, then the fraction of the work that is left is :

 Option A: 1/3

 Option B: 7/12

 Option C: 5/12

 Option D: 2/3

 Option E: 1/2
Example Output:
Option C