What tool provides guidance on replacing custom code developed for SAP ERP with SAP S/4HANA functionality for the system conversion?

What tool provides guidance on replacing custom code developed for SAP ERP with SAP S/4HANA functionality for the system conversion?
A . Simplification item check (Si-check)
B . Software update manager with database migration option
C . SAP code inspector
D . Software provisioning manager

Answer: A