You are the network administrator for Company. You are configuring a network consisting of 100 clientcomputers and six subnets for Company’s new office. You configure the first two subnets and configureclient computers on both subnets for testing. You test the initial configuration and discover that not all ofthe client computers can communicate with each other.The two subnets are show in the following diagram.  All client computers must be able to communicate with each other. What should you do？（）

• A、Change the subnet mask of all the client computers and on the two gateways to 255.255.255.240. 
• B、Change the subnet mask of all the client computers and on the two gateways to 255.255.255.255. 
• C、Change the IP address for Gateway2 to 131.107.5.214 and the IP address for Company21 to 131.107.5.210. 
• D、Change the IP address for Company11 to 131.107.5.190 and the IP address for     Company12 to 131.107.5.191.