Which step should you perform next to start the upgrade of the database?

As part of a manual upgrade process, after installing the software for Oracle Database 12c
and preparing the new Oracle home, you shut down the existing single-instance database.
Which step should you perform next to start the upgrade of the database?

A.
Start up the database instance by using the new location of the server parameter file and
run the catuppst.sqi script to generate informational messages and log files during the
upgrade.

B.
Start up the database instance by using the new location of the server parameter file and
run the cact1.pl script from the new Oracle home to use parallel upgrade options that
reduce down time.

C.
Start up the database instance by using the STARTUP UPGRADE command and gather
fixed object statistics to minimize the time needed for recompilation.

D.
Start up the database instance by using the STARTUP UPGRADE command, which
opens the existing database, and then performs additional upgrade operations.