What must occur in order for dynamic TKIP/ARC4 or CCMP/AES encryption keys to be generated? (Choose all that apply.)

What must occur in order for dynamic TKIP/ARC4 or CCMP/AES encryption keys to be generated? (Choose all that apply.)
A . Shared Key authentication and 4-Way Handshake
B . 802.1X/EAP authentication and 4-Way Handshake
C . Open System authentication and 4-Way Handshake
D . PSK authentication and 4-Way Handshake

Answer: BD