You work as a database administrator for Supportcenter.cn. On a Monday morning， you find the database instance aborted. After inspecting the alert log file， you execute the STARTUP command in SQL*Plus to bring the instance up. What statement is true？（）

A.Modify the value for the UTL_FILE_DIR parameter in the parameter file
B.Grant read and write privilege on the operating system path to the database users
C.Modify the value for the LDAP_DIRECTORY_ACCESS parameter in the parameter file
D.Modify the value for the PLSQL_NATIVE_LIBRARY_DIR parameter in the parameter file
E.Create a directory object referring to the operating system path， and grant read and write privilege on the directory object to the database users

A.3 hours
B.6 months
C.until last year
D.until last commit
E.until the point when the undotablespacewas refreshed
F.until the database is shut down and the memory erased

A.OracleSIDsonly
B.Oracle homes only
C.Oracle install timestamp
D.Oracle inventory pointer files
E.Oracle database creation timestamp
F.OracleSIDsand Oracle homes only
G.OracleSIDs， Oracle homes and flag for auto startup