Which carriers must include the names of flight crewmembers and attendants in the flight release?

The correct response pertains to the requirement that both supplemental and commercial carriers must list the names of flight crewmembers and attendants in the flight release. This rule is in place to enhance safety and operational accountability.

For supplemental carriers, which often operate under specific supplemental operating certificates, it's crucial to have a clear understanding of who is managing the flight to ensure compliance with regulations and standards set by aviation authorities. Including crew member names helps in tracking and verifying qualifications and certifications, and it supports effective coordination among the flight operations team.

Similarly, commercial carriers, which typically operate scheduled flights and are more heavily regulated by aviation authorities, also must clearly detail the crew members involved in a flight. This accountability serves vital functions such as ensuring that flight crews meet the necessary licensing and training requirements, as well as providing a record for operational integrity and safety.

The context behind the other options highlights the specific exemptions or differences regarding the requirements established for different types of operations within the aviation industry. For instance, flag carriers, known for international operations, and domestic carriers might have different regulatory frameworks that do not necessitate the same level of detail in flight releases, depending on their operating procedures and the regulatory standards they are subject to.