A、 Create one site for all offices. Place the subnets for the four branch offices and the Sydney main office in this site.

B、 Create two sites： one site for the four branch offices and one site for the Sydney main office. Place the subnets for the branch offices in one site. Place the subnet for the Sydney main office in the other site.

C、 Create three sites： one site for the four branch offices， one site for the Sydney main office， and one site for the Sydney satellite offices.

D、 Create four sites： one for the Melbourne and Perth branch offices， one site for the Berlin and Paris branch offices， one site for the Sydney main office， and one site for the Sydney satellite offices.

E、 Create five sites； one site for the Melbourne branch office， one site for the Perth branch office， one site for the Berlin branch office， one site for the Paris branch office， and one site for the Sydney main office. Place the subnets for each branch office and the Sydney main office in their respective sites.