Which Ap mode and submode must be implemented?

An engineer must implement intrusion protection the WLAN. The AP coverage is adequate and on-channel attacks are the primary concern. The building is historic, which makes adding APs difficult.

Which Ap mode and submode must be implemented?
A . Ap mode: local, Ap submode: WIPS
B . Ap mode: monitor, Ap submode: WIPS
C . Ap mode: monitor, Ap submode: none
D . Ap mode: local, Ap submode: none

Answer: D