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: Rahim bought 4 pillows with the average cost of $5. If Rahim also buys the fifth pillow with the price of $ 10, what is the average (arithmetic mean) price of those 5 pillows?

Option A: $6

Option B: $5

Option C: $5.5

Option D: $6.5

Option E: $7

Ex Output:
Option A

Ex Input:
Question: A car going at 40 miles per hour set out on an 90-mile trip at 9:00 A.M. Exactly 10 minutes later, a second car left from the same place and followed the same route. How fast, in miles per hour, was the second car going if it caught up with the first car at 10:30 A.M.?

Option A: 45

Option B: 50

Option C: 53

Option D: 55

Option E: 90

Ex Output:
Option E

Ex Input:
Question: A man buys an article and sells it at a profit of 20%. If he had bought it at 20% less and sold it for Rs.76 less, he could have gained 25%. What is the cost price?

Option A: s.380

Option B: s.375

Option C: s.375

Option D: s.350

Option E: s.300

Ex Output:
Option A