Which statement is true about configuring a nameserver in Oracle Linux?
A. If it is a primary nameserver, it must be an authoritative nameserver for all zones.
B. If it is a recursive nameserver, it must be a cache-only nameserver for all zones.
C. It may be authoritative for some zones and cache-only for other zones.
D. If it is a secondary nameserver, it must be an authoritative nameserver for all zones.
E. If it is a secondary nameserver, it must copy zone data from a primary nameserver.
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