(d) The requirement is to identify the characteristic that
distinguishes electronic data interchange (EDI) from other forms
of electronic commerce. Answer (d) is correct because standards
for EDI transactions, within any one group of trading partners,
have been agreed upon so as to allow the system to function efficiently.
Answer (a) is incorrect because the cost of EDI transaction
using a VAN will often exceed the cost of using the Internet.
Answer (b) is incorrect because software maintenance contracts
are often necessary. Answer (c) is incorrect because EDI commerce
involves legally binding contracts between trading partners.