As a general rule, which statement is true?

As a general rule, which statement is true?

A.
You should route when you can, switch when you must.

B.
You should switch when you can, route when you must.

C.
Layer-2/3 switches have more wide-area network (WAN) connections than routers.

D.
Routers have more local-area network (LAN) connections than Layer-2/3 switches.