What post-upgrade steps are essential to ensure the Cloud Pak for Data platform functions correctly? Select all that apply.

What post-upgrade steps are essential to ensure the Cloud Pak for Data platform functions correctly? Select all that apply.
A . Conducting thorough testing of the platform to verify functionality.
B . Reviewing the system logs for any errors during the upgrade process.
C . Informing all users that the system will be down for maintenance next week.
D . Re-enabling any services or user access that was disabled during the upgrade.

Answer: ABD