In which two scenarios would you need to relink Oracle executables using the Oracle relink utility?

You have multiple versions of the Oracle database software on a Linux machine. In which two scenarios would you need to relink Oracle executables using the Oracle relink utility? (Choose two.)

A.
After an operating system upgrade

B.
After applying the Oracle patch for a specific module

C.
After upgrading Oracle 9i Database to Oracle Database 10g

D.
After the database creation failed because of hardware failure