FusionComputeAdd toCNAsNode failure, which may be caused by the following reasons? (Multiple choice)

the following about HuaweiFusionSphere OpenStackmiddleGlance, CinderandSwiftWhich of the three descriptions is correct?

When using Rainbow to migrate a virtual machine to the HCS platform, the destination virtual machine's boot source must select a cloud disk.

FusionAccess adopts the industry-leading high-definition fidelity-desktop protocol, and can Fully connected to a centralized virtual desktop. (Please fill in the English abbreviation)

(Judgment) FusionComputeWhen the department mode is three-member separation, the system super administrator account isadmin.