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: For an employee to qualify for early retirement at a certain company, the sum of the employee's age and years of service must be at least 72, If Sue was K years old when she was hired by the company, what is the minimum age at which she could possibly qualify for early retirement.

Option A: K+36

Option B: 2K+36

Option C: (72+K

Option D: (72-K

Option E: 2(72-K

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: A departmental store has 4 managers and 16 associates. The 4 managers have an average salary of $900. The 16 associates have an average salary of $10,000. What is the average salary for the departmental store?

Option A: $8180

Option B: $9190

Option C: $4140

Option D: $5150

Option E: $6160

Ex Output:
Option A