An organization wants to use the Cisco SD$-$WAN regionalized service$-$chaining feature to optimize cost and user experience with applications in the network, which allows branch routers to analyze and steer traffic toward the required network function. Which feature meets this requirement?

A$.$ Cloud onRamp for Colocation

B$.$ Cloud onRamp for IaaS

C$.$ Cloud Services Platform

D$.$ VNF Service Chaining