What is contained within the large compartment of the refreshment center on the CRJ 550?

The large compartment of the refreshment center on the CRJ 550 typically contains non-perishable drinks and supplies. This design is important for functionality and safety during flights. Non-perishable items are chosen because they have a longer shelf life, which is essential for airline operations where items may need to be stored for extended periods before being used.

Having drinks and supplies that do not require refrigeration ensures that the aircraft can serve passengers efficiently throughout various flights without the concern of spoilage. Such items include bottled water, juices, and other beverages that remain safe and palatable over time.

The other options, while they may seem plausible, are not ideal for the airplane's operational setup. For instance, metalware is typically stored in more accessible areas for service, and dry foods and snacks are usually allocated to different storage sections designed for quick access during service. Extra seat cushions do not belong within a refreshment center as they are part of the aircraft's seating configuration rather than its provisions for passengers.