What information concerning Greater Cincinnati Airport in Covington, Kentucky, is contained in the accompanying NOTAM excerpt?

The correct response indicates that the airport has an experimental lighting system. This suggests that there may be specific considerations or limitations regarding the operation of aircraft in relation to this system, which pilots and operators must be aware of. The mention of an experimental system highlights potential changes or upgrades to airport operations that could affect safety, navigation, or approach.

The option related to the availability of a specific runway at nighttime would imply restrictions based on operational or lighting capabilities, which might not be indicated in every NOTAM. Similarly, the presence of an obstruction could lead to specific altitude or approach constraints, but it's not always the focus of a NOTAM unless it poses an immediate hazard or change. This highlights the necessity for pilots to review NOTAMs regularly for critical updates, especially concerning changes that involve new technology or systems at the airport.