Q: 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: 4, 12, 48, 240, 1440, 10080, (... )
Options: a. 80640, b. 10080, c. 6200, d. 10020, e. 12500
A:
a