You've just completed a survey of the wireless signals traversing the airspace in your employer's vicinity, and you've found an unauthorized AP with a very strong signal near the middle of the 100-acre campus. What kind of threat do you need to report to your boss?
A) Rogue AP
B) War driving
C) Bluesnarfing
D) Hidden node

Rouge AP(access point) is defined as type of Wi-fi access point that has been set-upped and installed on protected network without the explicit authorization from administrator of system.It is usually set-upped by attacker or hacked to work without the authorization on the network.

According to the situation mentioned in question, Boss should be reported with the risk issue of having rogue AP as unauthorized access point is observed in middle of the campus

Other option are incorrect because hidden node is found for communication with wireless access point in a network. Blue snarfing refers to accessing of information through device like Bluetooth in unauthorized way.
War-driving is searching of WiFi by an individual who is travelling in vehicle.
Thus, the correct option is option(A)