Which of these recommended designs provides the highest availability?

A.
map the Layer 2 VLAN number to the Layer 3 subnet

B.
control route propagation to edge switches using distribute lists

C.
use a Layer 2 distribution interconnection link with HSRP or GLBP

D.
use a Layer 3 distribution interconnection link with HSRP or GLBP

E.
use equal-cost Layer 3 load balancing on all links to limit the scope of queries in EIGRP

Explanation: