You have a network with varied bandwidths and need to choose a dynamic routing protocol. Which would you choose for optimal performance?

A. RIPv1
B. RIPv2
C. EIGRP
D. BGP

C. EIGRP metrics are bandwidth, delay, load, reliability, and MTU, while RIP is a distance-vector protocol and only takes hop count into consideration for the metric. BGP is not suited for optimal performance since a large amount of resources need to be dedicated for the protocol.