What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table?（）
- AThe switch will not forward unicast frames.
- BThe switch will forward the frame to a specific port.
- CThe switch will return a copy of the frame out the source port.
- DThe switch will remove the destination MAC from the switch table.
- EThe switch will forward the frame to all ports except the port on which it was received.