Two networks in different offices have been using DHCP set up for 192.168.0.0/24. After consolidating the officer’s networks, they have run out of IP addresses. Which of the following is the MOST cost-effective solution?

A.
Request another class C IP scope from the ISP.

B.
Switch to static IP addressing.

C.
Change the subnet mask to 255.255.254.0.

D.
Add a router to connect both networks.