Which two statements regarding the Policy Framework in Enterprise Manager (EM) are correct?（）

• A、Policy violations are prioritized as High, Medium, or Informational by category 
• B、Policies can be disabled completely, or flagged as ignored, for the specified target 
• C、Policies can be flagged as ignored, but never completely disabled, for the specified target
• D、Policy violations must be corrected, otherwise the database will shut down until corrective action occurs