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 person buys an article at $ 600. at what price should he sell the article so as to make a profit of 8 % ?
Options: a. 670, b. 689, c. 648, d. 740, e. 889

Output: c


Input: Consider Input: Problem: if ( 1 – 1.25 ) n = 4, then n =
Options: a. − 400, b. − 16, c. − 4, d. 4, e. 400

Output: b


Input: Consider Input: Problem: if the product of the integers from 1 to n is divisible by 378, what is the least possible value of n ?
Options: a. 7, b. 8, c. 9, d. 10, e. 11


Output: c