Which two statements about MAC addresses in the Cisco UCS are true?

Which two statements about MAC addresses in the Cisco UCS are true? (Choose two.)
A. The first 2 octets represent the manufacturer OUI.
B. The first 3 octets represent the manufacturer OUI.
C. The last 3 octets are assigned by the organization itself.
D. The last 4 octets are assigned by the organization itself.