Which two actions are performed by installing the Oracle 12c Preinstall RPM on Oracle Linux?

Which two actions are performed by installing the Oracle 12c Preinstall RPM on Oracle Linux?

A.
It creates the grid user if not already defined.

B.
It modifies the /etc/sysctl.conf Linux file.

C.
It installs kernel modules required for the ASM Cluster File System (ACFS).

D.
It installs the OpenSSH client package.

E.
It creates the oinstall group if not already defined.

Explanation:

When installed, the Oracle Preinstallation RPM does the following:
As needed, sets sysctl.conf settings, system startup parameters, and driver parameters to values based on recommendations from the Oracle Preinstallation
RPM program
Creates an oracle user, and creates the oraInventory (oinstall) and OSDBA (dba) groups for that user
Automatically downloads and installs any additional RPM packages needed for installing Oracle Grid Infrastructure and Oracle Database, and resolves any
dependencies
Sets hard and soft resource limits
Sets other recommended parameters, depending on your kernel version
Note: The Oracle RPMs for your Oracle Linux distributions and Oracle RDBMS releases automatically install any additional packages needed for installing Oracle
Grid Infrastructure and Oracle Database, and configure your server operating system automatically, including setting kernel parameters and other basic operating
system requirements for installation.
https://docs.oracle.com/database/121/LADBI/pre_install.htm#LADBI7493