How to create a core data services view? (3 ans)

How to create a core data services view? (3 ans)
A . Use SQL capabilities for Netweaver
B . Use data services tools for updates
C . Use DDL statement DEFINE VIEW and SQL like syntax to define the view
D . Use the ABAP Development Tools for SAP Netweaver
E . Use additional annotations – marked with the @sign

Answer: C,D,E