(a) The requirement is to identify a benefit of transmitting
transactions in an electronic data interchange (EDI) environment.
Answer (a) is correct because the speed at which
transactions can occur and be processed electronically results in
lower year-end receivables since payments occur so quickly.
Answer (b) is incorrect because an EDI environment requires
many controls related to sales and collections. Answer (c) is
incorrect because sampling may or may not be used in such circumstances.
Answer (d) is incorrect because third-party service
providers are often involved in such transactions—accordingly
they are relied upon. See Auditing Procedure Study Audit Implications
of EDI for information on electronic data interchange