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.

Example Input: Problem: in a mayoral election, candidate x received 1 / 2 more votes than candidate y, and candidate y received 2 / 5 fewer votes than z. if z received 25000 votes how many votes did candidate x received ?
Options: a. 18000, b. 22500, c. 24000, d. 26000, e. 32000
Example Output: b

Example Input: Problem: if y exceeds x by 25 %, then x is less than y by ?
Options: a. 28 %, b. 21 %, c. 20 %, d. 30 %, e. 29 %
Example Output: c

Example Input: Problem: a shopkeeper labeled the price of his articles so as to earn a profit of 40 % on the cost price. he then sold the articles by offering a discount of 5 % on the labeled price. what is the actual percent profit earned in the deal ?
Options: a. 18 %, b. 20 %, c. 17 %, d. 33 %, e. none of these
Example Output:
d