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: A circular swimming pool is surrounded by a concrete wall 4 feet wide.if the area of the wall is 11/25 of the area of the pool, then the radius of the pool in feet is?

 Option A: 22

 Option B: 20

 Option C: 9

 Option D: 8

 Option E: 1
[A]: Option B


[Q]: Question: A combustion reaction forms carbon dioxide. A carbon dioxide molecule contains one carbon and two oxygen atoms. If, over a period of 10 minutes, a combustion reaction creates 10,000 molecules of carbon dioxide then approximately how many more atoms of oxygen than carbon are created on average per minute?

 Option A: 1,000

 Option B: 500

 Option C: 250

 Option D: 50

 Option E: 0
[A]: Option A


[Q]: Question: Compute the value of a + b + c + d.

 Option A: 40

 Option B: 50

 Option C: 60

 Option D: 70

 Option E: 80
[A]:
Option D