According to the performance analysis recommendations; which steps are recommended after doing a database migration to SAP HANA?

According to the performance analysis recommendations; which steps are recommended after doing a database migration to SAP HANA?
A . Perform regular performance scans on your ABAP custom coding as part of the development process.
B . Perform regular performance scans on the ABAP coding delivered by SAP as part of your development process.
C . Activate your ABAP custom coding, which was deactivated before the database migration, using U transaction SFW5.
D . Switch the storage type of you custom database tables to column store and use the database utility (SE14) to perform the database table conversion.

Answer: A