Final Answer:
The fee for an authentication certificate is $6
Therefore, correct answer is D. $6
Step-by-step explanation:
The fee for an authentication certificate is $6, as indicated by option D. This cost is associated with obtaining a certificate that validates the authenticity and legitimacy of a document, identity, or transaction. Authentication certificates play a crucial role in ensuring the integrity and security of information in various contexts, such as online transactions, legal documents, or digital communications.
The $6 fee reflects the value and assurance provided by authentication certificates in verifying the identity of individuals or the authenticity of digital content. Organizations and individuals seeking to establish trust and credibility often opt for authentication certificates to secure their communications and transactions.
Therefore, correct answer is D. $6