A DRDA host database resides on a z/OS or an i5/OS system and listens on port 446. The TCP/IP address for this system is 192.168.10.1 and the TCP/IP host name is myhost. Which of the following commands is required to update the local node directory so that a DB2 client can access this DRDA database?（）

• A、CATALOG TCPIP NODE myhost REMOTE db2srv SERVER 446
• B、CATALOG TCPIP NODE mydb2srv REMOTE myhost SERVER 446
• C、CATALOG TCPIP NODE myhost REMOTE db2srv SERVER 192.168.10.1
• D、CATALOG TCPIP NODE mydb2srv REMOTE myhost SERVER 192.168.10.1