Acceptance criteria describe what the system must do to fulfill a requirement from the user or business perspective. They must be observable, testable, and relevant to the business outcome or expected behavior.

In this scenario, the user story is about monitoring blood pressure and receiving alerts for excessive pressure. The acceptance criteria should focus on system behavior, thresholds, and how alerts are triggered based on user settings.

Option D is not a good acceptance criterion because:

It specifies a technical implementation detail (JavaScript framework), which is not the concern of acceptance testing.

Acceptance criteria should not prescribe how the system is built, but what it must do from a business or user point of view.

Other options (A, B, and C) all reflect testable and behavior-focused outcomes linked to the user story’s goal.

Answer: D. The system should be developed using JavaScript framework to allow fast response times