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 Input:
Question: Machine P and Machine Q are each used to manufacture 770 sprockets. It takes Machine P 10 hours longer to produce 770 sprockets than Machine Q. Machine Q produces 10% more sprockets per hour than Machine A. How many sprockets per hour does Machine A produce?

Option A: 3

Option B: 5

Option C: 7

Option D: 9

Option E: 11

Ex Output:
Option C

Ex 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

Ex Output:
Option B

Ex Input:
Question: The Guests at a football banquet consumed a total of 406 pounds of food. if no individual guest consumed more than 2.5 pounds of food, What is the minimum number of guests that could have attended the banquet?

Option A: 160

Option B: 161

Option C: 162

Option D: 163

Option E: 164

Ex Output:
Option D