What test technique is being applied when deriving test cases from acceptance criteria?

The correct answer is based on the nature of black-box testing, which focuses on testing the functionality of the software based solely on the requirements and specifications, without any knowledge of the internal workings of the application. When deriving test cases from acceptance criteria, testers utilize the external observable behavior of the software, which aligns perfectly with the principles of black-box testing.

By concentrating on what the software should accomplish (as defined in the acceptance criteria) rather than how it operates internally, testers can create tests that confirm whether the software meets the specified requirements. This approach helps ensure that all user requirements and expected functionalities are covered, making black-box testing a suitable technique in this context.