Which task would you perform before you run Oracle Universal Installer (OUI) in silent or suppressed mode for an installation?

Which task would you perform before you run Oracle Universal Installer (OUI) in silent or
suppressed mode for an installation?

A.
Run the root.sh script.

B.
Run the oraInstRoot.sh script.

C.
Create the tnsnames.ora file.

D.
Create the oraInst.loc file.