Correct Answer is B
Reference: https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.monitoring.doc/GUID-AC5FAD2D-96DE-41C4-B5C6-A06FE65F34C6.html?hWord=N4IghgNiBcIKQCUAiBNEBfIA
Interpreting CPU performance metrics
Ready, %RDY:
This value represents the percentage of time that the virtual machine is ready to execute commands, but has not yet been scheduled for CPU time due to contention with other virtual machines.
Compare against the Max-Limited, %MLMTD value. This represents the amount of time that the virtual machine was ready to execute, but has not been scheduled for CPU time because the VMkernel deliberately constrained it. For more information, see the Managing Resource Pools section of the vSphere Monitoring and Performance Guide or Resource Management Guide.
If the virtual machine is unresponsive or very slow and %MLMTD is low it may indicate that the ESX host has limited CPU time to schedule for this virtual machine.
I would go for C:
https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.monitoring.doc/GUID-AC5FAD2D-96DE-41C4-B5C6-A06FE65F34C6.html
%RDY Percentage of time the resource pool, virtual machine, or world was ready to run, but was not provided CPU resources on which to execute.
100% = %RUN + %RDY + %CSTP + %WAIT
I will still go for B. C is for %WAIT -> Percentage of time the resource pool, virtual machine, or world spent in the blocked or busy wait state. Wheras %RDY is -> Percentage of time the resource pool, virtual machine, or world was ready to run.
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