What are two considerations when using resource pools in a vSphere cluster?

What are two considerations when using resource pools in a vSphere cluster? (Choose
two.)

A.
Default shares are equal for all sibling resource pools, regardless of virtual machines or
child pools

B.
By default, Reservations can be exceeded

C.
vMotion must be setup prior to creating Resource Pools

D.
DRS rules cannot violate Resource Pool membership