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.