What are the key capabilities of data transfer?

What are the key capabilities of data transfer?
A . Export from client systems and MDG system, including master data, key mapping, and value mapping
B . Conversion from IDoc format to SOA-Messages
C . Records with a matching score lower than the low threshold are not regarded as duplicates.
D . Import to MDG system, including master data, key mapping, and value mapping

Answer: A,B,D