When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs
respond?

A.
After waiting a SIFS, all APs reply at the same time with a probe response.

B.
After waiting a SIFS, a designated AP sends an ACK, and then replies with a probe response.

C.
Each AP sends its own ACK, and then follows the ACK with a probe response.

D.
For each probe request frame, only one AP may reply with a probe response.

E.
Each AP responds in turn after preparing a probe response and winning contention.