Definition: 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: Problem: a certain candy manufacturer reduced the weight of candy bar m by 5 percent buy left the price unchanged. what was the resulting percent increase in the price per ounce of candy bar m ?
Options: a. 5.5, b. 5.4, c. 5.3, d. 5.2, e. 5.1
Output:
d