When may a recreational pilot act as pilot in command in an aircraft towing a banner?

A recreational pilot is generally limited in the type of operations they can conduct, particularly concerning towing any objects, which includes banner towing. According to FAA regulations, recreational pilots are not allowed to act as pilot in command for operations that involve towing. This restriction is in place because towing requires a higher level of skill and experience than what is typically expected of a recreational pilot, as it involves additional complexities such as the handling of the aircraft, managing the tow line, and ensuring safety for the surroundings.

While some of the other choices might seem plausible under different circumstances, none of them apply to recreational pilots when it comes to banner towing specifically. The regulations are quite clear that banner towing is not permissible for recreational pilots, underscoring the seriousness of operational safety in aviation.