Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Ex Input:
Problem: how many prime numbers are between 29 / 3 and 87 / 6 ?
Options: a. 1, b. 2, c. 3, d. 4, e. 5

Ex Output:
b


Ex Input:
Problem: kathleen can paint a room in 4 hours, and anthony can paint an identical room in 5 hours. how many hours would it take kathleen and anthony to paint both rooms if they work together at their respective rates ?
Options: a. 8 / 15, b. 40 / 9, c. 15 / 8, d. 9 / 4, e. 15 / 4

Ex Output:
b


Ex Input:
Problem: country c imposes a two - tiered tax on imported cars: the first tier imposes a tax of 12 % of the car ' s price up to a certain price level. if the car ' s price is higher than the first tier ' s level, the tax on the portion of the price that exceeds this value is 8 %. if ron imported a $ 14,000 imported car and ended up paying $ 1440 in taxes, what is the first tier ' s price level ?
Options: a. $ 1600, b. $ 6000, c. $ 6050, d. $ 7050, e. $ 8000

Ex Output:

e