What is the Title to 14 CFR 121? Group of answer choices Certification and Operations: Airplanes Having a Seating Capacity of 20 or More Passengers or a Maximum Payload Capacity of 6,000 Pounds or More; and Rules Governing Persons on Board Such Aircraft Certification: Air Carriers and Commercial Operators Operating Requirements: Domestic, Flag, and Supplemental Operations Operating Requirements: Commuter and On Demand Operations and Rules Governing Persons on Board Such Aircraft