An administrator has deployed NSX within the vSphere environment, but is unable to deploy an NSX Controller. What step must be taken to resolve the issue?
A. Register the third-party security service device or virtual appliance with NSX Manager.
B. Deploy a distributed router and enable the High Availability option.
C. On the NSX Manager, select Enable multicast addressing and complete the configuration.
D. Define a data security group for all deployed virtual machine groups.
