Which of the Following Is Represented in a Physical Data

Which of the following is represented in a physical data flow?

A) The planned implementation of an input to or output from a physical process.
B) A database command or actions such as create, read, update, or delete.
C) The import of data or the export of data to another information system across the network.
D) The flow of data between two modules of subroutines within the same program.
E) all of these