Given the task definition and input, reply with output. 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: there is food for 760 men for 22 days. how many more men should join after two days so that the same food may last for 5 days more ?
Options: a. 2280, b. 2240, c. 2299, d. 2288, e. 2266
a