Question: ExpressJet Airlines operates flights under contract for Delta Air Lines. In the industry, this type of contract is called a Fee For Departure (FFD) contract. It is also know as an Airplane, Crew, Maintenance, and Insurance (ACMI) charter. ExpressJet is certificated and operates under exactly the same rules as Delta. As specified by both the DOT and the FAA, which of the airline descriptions below best describes ExpressJet Airlines? Group of answer choices ExpressJet is a Regional airline that operates domestic, flag, and supplemental flights. ExpressJet is a Commuter Airline that operates only regional flights. ExpressJet is a Regional/Supplemental airline ExpressJet is a Regional airline that operates only feeder service.