What must you consider regarding the extension of the maximum field length of the material number in SAP S/4HANA? Note: There are 2 correct Answers to this question.

What must you consider regarding the extension of the maximum field length of the material number in SAP S/4HANA? Note: There are 2 correct Answers to this question.
A . The extended material number functionality CANNOT be activated in a multi-system landscape
B. Custom code referring to the extension of the material number field length may need to be updated.
C. SAP provides technical compatibility for released external interfaces such as BAPIs and IDocs.
D. The extended material number functionality is activated by default in SAP S/4HANA

Answer: B,C