When using the Pre-Shared Key authentication method for WPA or WPA2, the pre-shared key isused for which two functions?

When using the Pre-Shared Key authentication method for WPA or WPA2, the pre-shared key is
used for which two functions? (Choose two.)

A.
to act as the Group Transient Key during the bidirectional handshake

B.
to act as thePairwise Master Key during the bidirectional handshake

C.
to derive the nonce at each side of the exchange

D.
to derive thePairwise Transient Key