An Elastic Network Interface (ENI) Is a Virtual Network Interface

An elastic network interface (ENI) is a virtual network interface that you can attach to an instance in a VPC. An ENI can include one public IP address, which can be auto-assigned to the elastic network interface for eth0 when you launch an instance, but only when you_____.

A) create an elastic network interface for eth1
B) include a MAC address
C) use an existing network interface
D) create an elastic network interface for eth0