The resource pool RP-KID has "Expandable Reservations" enabled. This setting allows a child resource pool to use unreserved resources from its parent. The parent, RP-MOM, has a 6GHz reservation. It allocates 1GHz to VM-M1 and 2GHz to RP-KID, leaving 3GHz of its reservation unallocated.

The VMs within RP-KID require a total of 4GHz (2GHz for VM-K1 + 2GHz for VM-K2). Since RP-KID's own reservation is only 2GHz, it has a 2GHz deficit. Because it is expandable, it can borrow the required 2GHz from RP-MOM's 3GHz unreserved pool. Therefore, vSphere admission control allows VM-K2 to be powered on.

A. Deactivating expandable reservations would prevent VM-K2 from powering on, as RP-KID's own 2GHz reservation would be insufficient for the 4GHz required by its VMs.

B. After VM-K1 and VM-K2 are on, RP-KID has borrowed 2GHz from RP-MOM, leaving only 1GHz of unreserved capacity in the parent. This is insufficient for a 6GHz reservation.

D. This statement is incorrect because it ignores the "Expandable Reservations" setting, which allows RP-KID to draw resources from its parent for admission control.

1. VMware vSphere Documentation

"vSphere Resource Management" for vSphere 8.0.

Section: Chapter 8

"Managing Resource Pools" > "Resource Pool Attributes".

Content: The documentation states

"If Expandable is selected

the resource pool can use resources from its parent resource pool... A non-expandable resource pool is not allowed to borrow resources from its parent." This directly supports the logic that RP-KID can use RP-MOM's resources.

2. VMware vSphere Documentation

"vSphere Resource Management" for vSphere 8.0.

Section: Chapter 8

"Managing Resource Pools" > "Resource Pool Admission Control".

Content: This section explains that when powering on a virtual machine

vSphere checks if the resource pool and its ancestors can satisfy the reservation. With expandable reservations

the check includes the parent's unreserved capacity. This confirms the mechanism described in the correct answer.