Which customizations are supported for key user in app extensibility in SAP S/4HANA Cloud? There are 3 correct answers to this question.

Which customizations are supported for key user in app extensibility in SAP S/4HANA Cloud? There are 3 correct answers to this question.
A . Create customs fields and tables.
B . Change and adapt the user interface layout of applications.
C . Change end-to-end solution process model steps.
D . Transform segments of ABAP code.
E . Create and extend analytical reports and forms.

Answer: A,B,D