What skills are required to use SAP SQL Data Warehousing?

What skills are required to use SAP SQL Data Warehousing?
A . SQL and database skills.
B . C++ to debug the SAP HANA source code Machine learning, because this is a prerequisite in all modern data warehouse implementations.
C . SAP BW/4HANA skills, because you can only access data in SAP SQL Data Warehousing through the SAP BW/4HANA query.

Answer: A