A.172.1.4.0/22
B.172.1.0.0/21
C.172.1.0.0/22
D.172.1.4.0/25  172.1.4.128/25  172.1.5.0/24  172.1.6.0/24  172.1.7.0/24
E.172.1.4.0/24  172.1.5.0/24  172.1.6.0/24  172.1.7.0/24

A.It establishes a static route to the 172.16.3.0 network.
B.It establishes a static route to the 192.168.2.0 network.
C.It configures the router to send any traffic for an unknown destination to the 172.16.3.0 network.
D.It configures the router to send any traffic for an unknown destination out the interface with the address 192.168.2.4.
E.It uses the default administrative distance.
F.It is a route that would be used last if other routes to the same destination exist.