Why should CPU and memory consumption be used to identify bottlenecks?

A.
Excessive CPU and memory consumption will slow the loading of vDisks and cache files by Provisioning Services.

B.
Excessive CPU and memory consumption on the vDisk store will slow down the PXE boot process.

C.
Excessive CPU and memory consumption can increase fragmentation of the TFTP boot strap file.

D.
Excessive CPU and memory consumption can increase fragmentation of the vDisks.