What are the three steps you should take to tune a JDBC Connection pool in WebLogic from the  initial settings in a production environment?（）

• A、Ensure the maximum size is increased to an appropriate setting.
• B、Set the minimum and maximum size of the connection pool to the same value.
• C、Increase the statement cache size.
• D、Add more heap to the JVM.
• E、Add more nodes to the cluster.