Which three statements are true about these groups?

You created the following groups on a Linux machine:
Group Name Description
oinstall This group owns the Oracle inventory.
dba This group identifies users belonging to the osdba group.
osoper This group identifies users belonging to the osoper group. oracle This group was created for the oracle OS user.
Which three statements are true about these groups? (Choose three.)

A.
Users belonging to the oracle group can perform a hot database backup.

B.
Users belonging to the oinstall group can upgrade the Oracle software.

C.
Users belonging to the dba group can connect to the database as "/ as sysdba".

D.
Users belonging to the osoper group can connect to the database as "/ as sysoper".

E.
Users belonging to the oinstall group can connect to the database instance as "/ as sysdba".