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？ （）

• A、The Advisory is on and will capture both CPU and memory overhead.
• B、The Advisory is on but the memory for the Advisory is not allocated.
• C、The Advisory is off and the memory for the Advisory is not allocated.
• D、The Advisory is off but the memory for the Advisory remains allocated.