What possibilities do you have when upgrading an SAP HANA Cloud, SAP HANA database instance? Note: There are 2 correct answers to this question.

What possibilities do you have when upgrading an SAP HANA Cloud, SAP HANA database instance? Note: There are 2 correct answers to this question.
A . Upgrade the replica first
B . Select the version to
C . install Upgrade without restart
D . Revert to a previous version

Answer: B C