Which of the Following About Scheduling Is TRUE

Which of the following about scheduling is TRUE?

A) HQoS schedulers cannot be children of an egress port-scheduler.
B) HQoS schedulers provide a dynamic method of allocating scheduling resources to queues.
C) HQoS scheduler policies can be applied to an MDA to schedule network ingress traffic.
D) A scheduler policy applied to multiple SAPs within the same service will result in a single hardware scheduler operating across all SAPs within the service.