A small business wants to deploy IP telephony across its enterprise but lacks the expertise and staffing to plan and deploy the service. Its concerns include cost, ensuring voice quality, and time to deployment. Given only these requirements, what is the appropriate option to recommend?

A.
Provision the network using AutoQoS VoIP.

B.
Configure NBAR for stateful packet inspection.

C.
Use CBWFQ.

D.
Configure each router to mark VoIP packets as CoS 5.