Refer to the exhibit. Area 10 is a regular OSPF area, and networks 10.1.1.0/24 and 172.16.1.0/24 are internal. Which design provides optimal routing between both networks when the link between routers C and E fails? 

Answer options:

A. Move the link between routers C and D to area 10.
B. Create an OSPF virtual link between routers E and
F.C. Create a tunnel between routers E and F in area 10.
D. Make area 10 a not-so-stubby area.

A