What are the 4 VM Restart Priority options available on an HA cluster?

What are the 4 VM Restart Priority options available on an HA cluster?

A.
Enabled, Small, Medium, Large

B.
1st, 2nd, 3rd, 4th

C.
Priority, 2nd Tier, 3rd Tier, Best Effort

D.
Disabled, Low, Medium, High