When designing the coverage area for high call capacity, what two actions should be done with data rates and channels?（）

• A、Avoid channels with high AP co-channel interference.
• B、Use channels with high AP co-channel interference to avoid channel roams.
• C、Set the 2.4-GHz data rate of 5.5 Mb/s to required.
• D、Use 5-GHz channels when possible.
• E、Use 2.4-GHz channels when possible.