What type of testing is normally conducted to verify that a product meets a particular regulatory requirement?

Acceptance testing is designed specifically to evaluate whether a system or product complies with the specified requirements, including regulatory requirements. This testing type typically involves end-users or stakeholders who assess the software under conditions that mirror real-world usage. By focusing on meeting the acceptance criteria, which often includes ensuring adherence to legal, regulatory, or organizational standards, this testing helps confirm that the software can be deployed in the intended environment and that it fulfills all necessary obligations.

The other types of testing mentioned serve different purposes. Unit testing focuses on individual components for functionality; integration testing examines the interaction between integrated components; and system testing evaluates the entire system's compliance with specified requirements. While system testing may assess some regulatory aspects in a broader sense, acceptance testing specifically targets stakeholder requirements and compliance, making it the most appropriate choice to verify adherence to regulatory standards.