What is the difference between partially automated and fully automated DRS clusters?

A.
Partially automated clusters are a result of a fully automated cluster becoming yellow.

B.
Fully automated clusters migrate virtual machines to optimize resource usage.

C.
Partially automated clusters migrate virtual machines using a more conservative
algorithm.

D.
Fully automated clusters do not take individual virtual machine rules into account.

Explanation:
The screenshot below shows that fully automated clusters migrate virtual machines to
optimize resource usage