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.
--------
Question: Problem: a student travels from his house to school at 12 km / hr and reaches school 2 hours late. the next day he travels 20 km / hr and reaches school 1 hour early. what is the distance between his house and the school ?
Options: a. 90, b. 100, c. 110, d. 120, e. 130

Answer: a


Question: Problem: how many integers v are prime numbers in the range 200 < v < 220 ?
Options: a. 1, b. 2, c. 3, d. 4, e. 5

Answer: a


Question: Problem: given f ( x ) = 3 x – 5, for what value of x does 2 * [ f ( x ) ] + 2 = f ( 3 x – 6 )
Options: a. 0, b. 4, c. 5, d. 7, e. 13

Answer:
c