Which one of the following statements about BGP is FALSE?（）

A.BGP uses TCP port 179.

B.BGP ensures reliability of updates by using the reliable transport services of TCP.

C.The network command with the mask option never insta lls a prefix into the BGP table unless there is a matching prefix exists in the IP route table.

D.A TCP connection is required before exchanging updates.

E.BGPuses notification and the update messages to establish and maintain the BGP neighbor relati onship.