What are valid reason to generate external SAP HANA View for SAP BW/4HANA objects? Note: there are 2 correct answers to this question.

What are valid reason to generate external SAP HANA View for SAP BW/4HANA objects? Note: there are 2 correct answers to this question.
A . To consume SAP BW/4HANA data and manage access with native SAP HANA concepts
B . To apply SAP HANA transformational logic instead of SAO ABAP logic
C . To leverage the SAP HANA-optimezed Analytic Manager to process BW Query
D . To create an additional persistent layer of data in SAP HANA

Answer: A,C