The ORACLE_SID environment variable is set to +ASM. ASMLIB is not used in the configuration. You executed the following command to startup the Automatic Storage Management (ASM) instance. SQL> STARTUP; Which two activities are performed during a successful start up operation?（）
- A The databases configured to use the ASM instance are mounted
- B The disk groups are mounted as per the ASM_DISKGROUPS initialization parameter
- C ASM starts the Oracle Cluster Synchronization Services (CSS) daemon if it is not started
- D ASM discovers and examines the contents of all files that are in the paths specified in the ASM_DISKGROUPS initialization parameter