You will be given a definition of a task first, then some input of the task.
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.

Problem: the water level in a reservoir has been dropping at the rate of 14 inches per day. exactly 5 days ago, the water level was at w inches. what will be the water level exactly 3 days from now if the rate at which the level is dropping remains the same ?
Options: a. w 126, b. w 56, c. w 112, d. w + 14, e. w + 126
Output:
c