Service graphs and service functions have which three characteristics? (Choose three.)

Service graphs and service functions have which three characteristics? (Choose three.)
A . Service graphs can only consist of a single service appliance.
B . Service graph edges are directional.
C . Taps (hardware-based packet copy service) can be attached to different points in the service graph.
D . Service appliances are dynamically detected and configured when added to a service graph.
E . The service graph restricts the administrator to linear service chains.
F . Traffic can be reclassified again in the network after a service appliance emits it.

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Answer: B, C, F