Customer Has Changed Avaya Aura Core and the Avaya Equinox

Customer has changed Avaya Aura Core and the Avaya Equinox Conferencing solution domain name. As a result, new FQDNs were assigned to all solution components. New server identity certificates are now required. This customer does not use a Third-Party Certificate Authority (CA) and is not planning to. The customer is asking you if signed identity certificates can be generated internally. What would you recommend?

A) Use Avaya Aura Device Services (AADS) as an internal Certificate Authority (CA) .
B) A Certificate Authority (CA) is not a mandatory requirement as all Avaya Aura Core and Equinox solution components support self-signed certificates.
C) Use Utility Services as an internal Certificate Authority (CA) .
D) Use System Manager as an internal Certificate Authority (CA) .