What are three design criteria to consider when you choose how many classes to implement in a DiffServ policy? (Choose three.)
A. service provider support capabilities, which include SLA, PHB, and marking criteria
B. the ability to group applications and their requirements into classes
C. baseline expectations and projected growth of RSVP sessions
D. the ability to leverage single-rate and dual-rate token bucket policers for different classes
E. the total queue depth on the corresponding devices in the network
F. different capabilities in the network to apply PHBs and queue structures, and the ability to map multiple service classes to PHB
