What are the follows of implementation?

What are the follows of implementation?
A . Multiple ERP Customers and ERP Vendor can be assigned to one MDG Business Partner.
B . ERP Customer and ERP Vendor specific data, including sales and purchasing organization and company code data, can be maintained per assigned ERP Customer or ERP Vendor.
C . The customer or supplier is treated differently within several business units of the same company code.
D . Deviations of central fields like Name 3, Telephone number, and Bank details for example, can be maintained within a specific U
E . A small project-specific implementation is required.

Answer: A,B,C,D