How does IPv4 address exhaustion influence NAT usage and IPv6 adoption?

• A. NAT is used to conserve address space; IPv6 provides abundant addresses enabling end-to-end connectivity.
• B. NAT eliminates the need for IPv6 altogether.
• C. IPv6 adoption is slowed by NAT, so NAT remains mandatory.
• D. NAT and IPv6 are unrelated and do not affect each other.

Answer: (D)