What is one challenge distributed enterprises face with traditional branch architecture?

What is one challenge distributed enterprises face with traditional branch architecture?
A . A traditional branch architecture unifies security policies centrally, which frustrates local IT staff what do not understand the policies.
B . A traditional branch architecture does not support a WAN established over MPLS, which is the most costeffective choice for most customers.
C . Traditional branches do not have enough separate hardware devices for customers to meet performance requirements.
D . In a traditional architecture, all branch traffic has to be routed through the datacenter to get the Internet or the cloud.

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Answer: B