What is the difference between an exporter and a migrator?

A.
An exporter migrates IBM Tivoli Storage Manager (TSM) data; a migrator migrates
Independent Software Vendor (ISV) data.

B.
A migrator migrates TSM data; an exporter migrates ISV data.

C.
A migrator migrates structured data; an exporter migrates all types of data.

D.
An exporter migrates structured data; a migrator migrates all types of data.