what would an attacker have to spoof to initiate a deauthentication attack against connected clients?

In an 802.11 wireless network, what would an attacker have to spoof to initiate a
deauthentication attack against connected clients?

A.
the BSSID of the AP where the clients are currently connected

B.
the SSID of the wireless network

C.
the MAC address of the target client machine

D.
the broadcast address of the wireless network