An engineer is working for a service provider who is strategically important to the Internet data traffic. The CTO is promoting a core infrastructure upgrade to connect via optical links network service providers. Which three concerns must be addressed while planning the new BGP features and functionalities?

A.	BGP suboptimal routing
B.	IPv4 exhaustion
C.	routers and switches hardware capabilities
D.	route dampening of current customers
E.	multihoming policies of new customers
F.	IGP reconvergence time on the inter-AS links
G.	BGP blackholing when acting as transit autonomous system