A managed Apple device supports only one enrollment profile to ensure single authority management. The Mobile Device Management Protocol Reference specifies, "A device can only be enrolled with one MDM enrollment profile at any given time. Applying a new enrollment profile requires removing the existing one." Options A, B, and C are incorrect due to this strict limitation.
Reference:
Mobile Device Management Protocol Reference, "Enrollment Profile" section.
Apple Platform Deployment Guide, "MDM Enrollment" section.