Which two statements are true regarding RIB groups? (Choose two.)
A. The first table listed is the primary route table and determines the address family of the RIB group.
B. The last table listed is the primary route table and determines the address family of the RIB group.
C. A RIB group must contain one or more export-rib statements.
D. A RIB group must contain one or more import-rib statements.