While in flight, an alternating red and green light directed at you from the control tower means?

An alternating red and green light directed at an aircraft from the control tower signifies a need for caution but allows for the possibility of landing with care. Specifically, this signal is an instruction to exercise extreme caution. Pilots should be aware that there may be potential hazards in the area, which could include other aircraft, obstacles, or unusual ground conditions. It is essential for pilots to maintain situational awareness and proceed with heightened caution when receiving this signal.

The other options imply a more definitive action. For example, stating that the airport is unsafe and that landing should not occur is too broad and does not take into account situations where landing is still a possibility with caution. Similarly, giving way to other aircraft while continuing to circle suggests a routine traffic pattern rather than an immediate cautionary approach that the alternating light indicates. Therefore, option A best captures the intent behind the alternating light signal, reflecting both the urgency and need for care in the landing approach.