A technician installs a wireless router on an existing network by connecting it directly to the firewall. By default, the main network is a Class A network, while the wireless network is a Class C network. After the wireless router is installed, users connected to the wireless network report they are unable to connect to the Internet. Which of the following needs to be configured to BEST resolve this issue?
A. Configure the main network to Class C
B. Allow for duplicate IP addresses
C. Allow the main network to handle DHCP
D. Create a spanning tree to prevent switching loops
