Which Statements About the Process of Establishing a BGP Peer

Which statements about the process of establishing a BGP peer relationship are true? (Choose three.)

A) There may be two TCP connections during the establishment of the BGP peer relationship.
B) If two TCP connections are established between BGP peers, one connection functions as the primary connection, and the other as the backup connection.
C) If two TCP connections are established between BGP peers, one TCP connection is torn down.
D) If there are "multiple" TCP connections between BGP peers, BGP keeps the TCP connection initiated by the peer with a greater BGP router ID.