Your network contains a server that runs ISA Server 2006. The ISA Server provides firewall services. The server also segments the internal network. A DHCP server assigns the IP configuration to all client computers in the network. You manually assign the IP configuration to all servers in the network. The ISA Server is the default gateway for the internal network.
Users report that when they try to connect to the Internet they lose their connection or the connection is very slow.
When you run a network trace you notice that some computers lose the connection to the network when a large number of TCP sessions are established in a short space of time. You also notice that the TCP packet header sequence numbers are different after passing through the ISA Server.
You need to resolve the connectivity issues.
What should you do?

A.
Disable the Block IP fragments option and enable the Enable IP routing option.

B.
Disable the Enable IP routing option and disable the Mitigate flood attacks and worm propagation option.

C.
Increase the Maximum concurrent TCP connections per IP address value and enable the Enable IP routing option.

D.
Add the IP addresses of the affected computers to the Flood Mitigation Exceptions computer group and enable the Enable IP routing option.