What changes are necessary to application code in order to implement DNSSEC?

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What changes are necessary to application code in order to implement DNSSEC?
A . Adding encryption modules
B . Implementing certificate validations
C . Additional DNS lookups
D . No changes are needed.

Answer: D

Explanation:

To implement DNSSEC, no additional changes are needed to applications or their code because the integrity checks are all performed at the system level.