A Server Named Server 1 Functions as a DHCP and DNS

Multiple Choice

A server named Server 1 functions as a DHCP and DNS server. All client computers are configured to use Server 1 for name resolution, and all DNS zones on Server 1 are enabled for DNS dynamic updates. A server named Server 25 contains antivirus server software.
It must be able to contact client computers using fully qualified domain names to propagate virus definition updates. You need to ensure that Server 25 can resolve FQDNs for all client computers on the network. Which of the following options should you modify on Server 1?

A) Dynamically update DNS A and PTR records only if requested by the DHCP clients check box.
B) Always dynamically update DNS A and PTR records check box.
C) Dynamically update DNS A and PTR records for DHCP clients that do not request dynamic updates (for example, clients running Windows NT 4.0) check box.
D) Discard A and PTR records when lease is deleted check box.