Option C correctly uses an HTTP POST request to send the necessary payload to Cisco APIC. This method is suitable for creating new resources like an EPG when the specified Tenant and application profile exist. The POST request will ensure that the configuration is applied only if the conditions are met, aligning with the requirement that the firewall policy allows only HTTP connectivity. References := For further details, the Cisco APIC REST API Configuration Guide provides comprehensive instructions on using HTTP methods for APIC configurations.