What statement is true regarding the nonces (ANonce and SNonce) used in the IEEE 802.11 4 Way Handshake?

A: Both nonces are used by the Supplicant and Authenticator in the derivation of a single PTK. B: The Supplicant uses the SNonce to derive its unique PTK and the Authenticator uses the ANonce to derive its unique PTK, but the nonces are not shared. C: Nonces are sent in EAPoL frames to indicate to the receiver that the sending station has installed and validated the encryption keys. D: The nonces are created by combining the MAC addresses of the Supplicant, Authenticator, and Authentication Server into a mixing algorithm.