A routing protocol has three characteristics:
Has fast convergence with triggered, incremental updates via link state advertisements (LSAs)
Is classless protocol allowing for a hierarchical design with VLSM and route summarization
Uses an intelligent metric (cost), which is the inverse of the bandwidth of an interface
Which protocol is it?

A.
BGP

B.
RIPv1

C.
RIPv2

D.
OSPF