You have the following entry in the tnsnames.ors of your hq.us.example.com host machine: 

You issue the following command at the command prompt: Sqlplus HR/HR@ORCL - Which statement is true about the connection to the ORCL database instance? 

Answer options:

A. The connection succeeds, provided the NAMES.DEFAULT_DOMAIN parameter is set to us.example.com in the sqlnet.ora file on the client side.
B. The connection fails because the net service name does not have the suffix us.example.com.
C. The connection succeeds, provided the SERVICE_NAMES initialization parameter is set to ORCL.
D. The connection succeeds, provided the ORCL.us.example.com database service is registered with a listener, the listener is up, and the database is open.

D