Why is a security concept in SAP HANA required? There are 2 correct answers to this question

Why is a security concept in SAP HANA required? There are 2 correct answers to this question
A . Need to have selected users in SAP HANA for Information Management
B . Access to ERP tables must be restricted
C . Editing of SAP HANA data models should only be possible for "Users" of the model
D . Database administration should be restricted to skilled

Answer: B,D