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: a transport company ' s 120 buses running 20 hrs a day consume 360 of fuel in a day. in the next 3 days, the company will invest in 30 more green buses that use 30 % less fuel. how many lts of fuel will be consumed in a 5 day week after the new buses are added to the fleet ?
Options: a. 3060, b. 1, 512, c. 1800, d. 1260, e. 3,312
e