Choice "A" is correct. A WebTrust engagement is an attestation engagement designed to measure transaction integrity, information protection, and disclosure of business practices. When an unmodified report is issued, the client may add the CPA WebTrust Seal to its Web site, indicating that its site is a reasonably safe and private place for e-commerce.
Choice "d" is incorrect. ElectroNet is an Internet service provider.
Choice "b" is incorrect. EDIFACT refers to standards developed by the United Nations for Electronic Data Interchange for Administration, Commerce, and Transport. These standards facilitate information flow among trading partners in many industries. The scope and format of these standards is similar, but not identical, to those developed in the United States.
Choice "c" is incorrect. TechSafe is a distractor.