Oracle9i offers the ability to monitor the dynamic use of the SGA through the DB_CACHE_ADVICE parameter. When this parameter is set to READY， what is its effect？ （）
- AThe Advisory is on and will capture both CPU and memory overhead.
- BThe Advisory is on but the memory for the Advisory is not allocated.
- CThe Advisory is off and the memory for the Advisory is not allocated.
- DThe Advisory is off but the memory for the Advisory remains allocated.