Q12. Examine this command and some partial output:

Why does the DB01.abc.com service show unknown status?
- (A). The service DB01.abc.com is dynamically registered
- (B). The LOCAL_LISTENER database parameter is not set to a service name that refers to LISTENER_1
- (C). The service DB01.abc.com is statically registered
- (D). The listener is not listening on the default port 1521
- (E). The SID_LIST_LISTENER section is not contained in the LISTENER.ORA file
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