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.
Q: Problem: andy solves problems 75 to 125 inclusive in a math exercise. how many problems does he solve ?
Options: a. 53, b. 52, c. 51, d. 50, e. 49
A: 
c