AWS Certified Advanced Networking - Specialty (#69)

You are building an application in AWS that requires Amazon Elastic MapReduce (Amazon EMR). The application needs to resolve hostnames in your internal, on-premises Active Directory domain. You update your DHCP Options Set in the VPC to point to a pair of Active Directory integrated DNS servers running in your VPC. Which action is required to support a successful Amazon EMR cluster launch?

Add a conditional forwarder to the Amazon-provided DNS server.
Enable seamless domain join for the Amazon EMR cluster.
Launch an AD connector for the internal domain.
Configure an Amazon Route 53 private zone for the EMR cluster.