You have decided to implement the principle of least privilege and separation of duties. Which two actions must you take? (Choose two.)
A. Assign different O/S groups to the OSOPER and OSDBA credentials
B. Grant SYSOPER to application schema owners
C. Assign the OSOPER and OSDBA groups to the Oracle software owner O/S account
D. Assign the DBA role to application schema owners
E. Grant access to the Oracle software owner O/S account to all database administrators