You are designing a strategy for adding the additional hardware necessary to support Contoso， Ltd.  What should you do？（）

• A、 Add a T1 Wan Link Between Chicago and San Francisco.
• B、 Add a T3 Wan Link Between Chicago and San Francisco.
• C、 Add a Basic ISDN Connection between Chicago and San Francisco.
• D、 Configure HighSpeed modems in Chicago and San Francisco to support demand-dial routing.