Which two of the following are high-availability design considerations ? (choose two.)

A.
Layer 2 and Layer 3 distribution with HSRP or GLBP is the only distribution option.

B.
Avoid asymmetric routing and unicast flooding.

C.
only use HSRP or GLBP if you must.

D.
keep redundancy simple.

E.
Use diasy-chaining stackable switches whenever possible.