Why is de-coupling your extensions from SAP S/4 HANA Cloud required? (2 correct)

Why is de-coupling your extensions from SAP S/4 HANA Cloud required? (2 correct)
A . To ensure extensions do not conflict with SAP software updates
B . To guarantee the stability of the system
C . To enhance existing functionality within the application itself
D . To allow customers to take advantage of predefined user exits

Answer: A, B