How does sap hana smart data access (SDA) differ from sap hana smart data integration (SDI)?

you create a new sap hana remote connection .

How does sap hana smart data access (SDA) differ from sap hana smart data integration (SDI)? (2 answer)
A . SDI is recommended for data source with limited changesin data structure SDA contains features to act as a full blown ETL tool"
B . SDI supports data replication in real time SDA does not provide this capability"
C . SDI requires an additional sap hana data provisioning server SDA is integrated in the sap hana index server"
D . SDI is used only for sap hana native apps the SDA interface is used for sap bw/4hana models"

Answer: A,B