为自己加油

Choose three. Which three are true about recovery operations done
Without using Recovery Manager (RMAN)?

A.A lost PFILE can be re-created from alert.log using SQL*PLUS.
B.A lost index tablespace can be re-created without performing any recovery.
C.A lost password file can be manually re-created with the orapwd utility.
D.A lost password file can be re-created with SQL*PLUS.
E.A lost SPFILE can be recovered from memory using SQL*PLUS.
F.A lost TEMPFILE must always be re-created manually.