Under which two conditions does an enterprise require BGP peering with its upstream Internet provider?

A.	The enterprise has two exit points that are geographically separated and routing must be controlled so that delay variations are reduced.
B.	The enterprise has one exit point and must announce the IP class it has been assigned from its ISP.
C.	The enterprise has two Layer 2 links to the upstream ISP in the same location and wants to achieve redundancy.
D.	The enterprise needs a simple and efficient way to ensure proper routing for its AP subnets on its single ISP link.
E.	The enterprise is multihomed to two ISPs and has its own IP space AS number.