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: If N = 2^0.1 and N^b = 16, b must equal

Option A: 3/80

Option B: 3/5

Option C: 40

Option D: 5/3

Option E: 80/3
Example Output: Option C

Example Input: Question: A tank holds x gallons of a saltwater solution that is 20% salt by volume. One Fourth of the water is evaporated, leaving all of the salt. When 5 Gallons of water and 10 gallons of salt are added, the resulting mixture is 33 1/3 % salt by volume. What is the value of x?

Option A: 37.5

Option B: 75

Option C: 100

Option D: 150

Option E: 175
Example Output: Option B

Example Input: Question: A father was as old as his son's present at the time of your birth. If the father's age is 44 years now, the son's age 5years back was?

Option A: 10 years

Option B: 12 years

Option C: 14 years

Option D: 16 years

Option E: 17 years
Example Output:
Option E