An administrator created a new ADOM named Training for FortiGate devices only.

The correct answer is C. The FortiManager 7.6 Administrator Study Guide states that after adding the root FortiGate of a Security Fabric, all downstream devices in the fabric are automatically added as Unauthorized in the root ADOM. That directly matches option C.

This is important because the administrator created a FortiGate-only ADOM named Training, not a Fabric ADOM. The lab guide explains that a FortiGate ADOM is intended for FortiGate devices, while the Fabric type is the special ADOM type that allows FortiGate and other device types together.

So the downstream members are not automatically authorized, and they do not immediately appear as managed devices inside the Training ADOM. They first appear as unauthorized devices in the root ADOM, where the administrator can review and authorize them.

=========