The Cisco IOS SLB feature is a Cisco IOS-based solution that provides server load balancing. This feature allows you to define a virtual server that represents a cluster of real servers， known asa server farm.  When a client initiates a connection to the virtual server， the IOS SLB load balances theconnection to a chosen real server， depending on the configured load balance algorithm orpredictor.  Which three implementation modes may be used to deploy SLB？ （）

• A、 Router mode
• B、 One-arm mode
• C、 Three-arm mode
• D、 Bridge mode inline