Channing had been working for the lumber company for 6 years. He had taken extra shoes, arrived early, trained new employees. Now that the position of assistant manager was opening up, he hoped all of his dedication and hard work was worth it. What is the central idea of this paragraph?
A. Being an assistant manager requires Channing to additional responsibilities.
B. Working at a Lumber Company often means working longer hours than expected.
C. Channing is hoping all of his years of service will result in a promotion.
D. The best employees know that it's important to accept additional shifts.