Oracle Exadata Database Service on Exascale Infrastructure is eligible for both the Private Offer and Public Offer , with the Public Offer representing the Pay As You Go marketplace model.
A Private Offer is negotiated with Oracle and can include custom pricing, contract terms, usage commitments, and enterprise commercial arrangements. After agreement, the customer accepts the private offer through Azure Marketplace.
A Public Offer allows supported Oracle AI Database@Azure services to be purchased directly from Azure Marketplace without first negotiating a private commercial agreement. Oracle describes this model as Pay As You Go, with no predetermined usage commitment. Oracle's current Azure service table explicitly lists Exadata Database Service on Exascale Infrastructure as eligible for both offer types.
Azure Reserved Instance pricing is an Azure compute purchasing construct and is not one of the Oracle AI Database@Azure offer mechanisms. Oracle also specifies that free-trial subscription models are not the purchasing path for these multicloud database resources.
Therefore, B and C are correct.
Study Guide reference: Oracle AI Database@Azure Architecture and Onboarding - Public Offer, Private Offer and Exascale purchasing.