Instructions: 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: q and r are two - digit positive integers that have the same digits but in reverse order. if the positive difference between q and r is less than 30, what is the greatest possible value of q minus r ?
Options: a. 23, b. 24, c. 25, d. 26, e. 27
Output:
e