Choice "C" is correct. The Internet permits EDI transactions to be sent to trading partners as transactions occur, rather than batching them periodically (as with a VAN).
Choice "b" is incorrect. A VAN batches transactions to multiple trading partners, whereas transactions over the Internet are sent to each trading partner as they occur.
Choice "a" is incorrect. A VAN is superior to the Internet in terms of disaster recovery because the additional service provided by VANs often includes the archiving of data. Records of EDI transactions may be kept for months or years, which can aid in the disaster recovery process.
Choice "d" is incorrect. Regardless of the method of transport used, translation software is still needed in an EDI environment.