Which of the following is a responsibility of the UAS crew during operations?

The responsibility of the UAS (Unmanned Aircraft System) crew during operations includes controlling external communications. This is crucial because effective communication ensures that the UAS crew can monitor operations, receive real-time feedback from ground control or other agencies, and coordinate with air traffic control when necessary. Managing external communications is vital for maintaining safety and compliance with aviation regulations, particularly in crowded airspace or complex environments.

In contrast, directly operating the UAS is typically the responsibility of the remote pilot or operator rather than the entire crew, making that option less applicable to crew duties. Handling financial transactions does not pertain to UAS operations and is outside the scope of what crews need to focus on during flight. Similarly, managing passenger seating is irrelevant as UAS operations generally do not involve passenger transport, especially in the context of drone or unmanned aviation where crew responsibilities are focused on operational safety and efficiency. Thus, controlling external communications stands out as the most relevant and critical responsibility of the UAS crew during operations.