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.

Input: Consider Input: Problem: a cyclist bikes x distance at 8 miles per hour and returns over the same path at 10 miles per hour. what is the cyclist ' s average rate for the round trip in miles per hour ?
Options: a. 8.1, b. 8.9, c. 8.6, d. 8.3, e. 9.0

Output: b


Input: Consider Input: Problem: what is the median of a set of consecutive integers if the sum of nth number from the beginning and nth number from the end is 110 ?
Options: a. 10, b. 25, c. 55, d. 75, e. 100

Output: c


Input: Consider Input: Problem: albert invested rs. 6500 in a scheme for 2 years at compound interest rate 6.5 % p. a. how much amount will albert get on maturity of the fixed deposit ?
Options: a. s. 8829, b. s. 7200, c. s. 7200.5, d. s. 4000, e. s. 7372.46


Output: e