(c) The requirement is to identify an additional cost of
transmitting business transactions by means of electronic data
interchange (EDI) rather than in a traditional paper environment.
Answer (c) is correct because such transactions must be
translated to allow transmission. Answer (a) is incorrect because
no particular controls are required for redundant data checks
under EDI as compared to a traditional paper environment.
Answer (b) is incorrect because there need be no increase in
random data entry errors under EDI. Answer (d) is incorrect
because since computer controls are ordinarily heavily relied
upon under EDI, often fewer supervisory personnel are needed.