What is Trusted Tester 4A concerned with?

• A. Color contrast evaluation
• B. Audio description testing
• C. Form autofill accessibility
• D. All functionality can be accessed and executed using only keyboard

Answer: (D)

Keyboard-only operability is the focus. Trusted Tester 4A requires that every function of a product can be accessed and executed using a keyboard alone, without needing a mouse or other pointing device. This means a logical focus order, visible focus indicators, and the ability to navigate, activate, and complete tasks via keyboard interactions (like Tab, Shift+Tab, Enter, Space, and arrow keys). This ensures access for users with motor disabilities or those who rely on assistive technologies. While color contrast, audio descriptions, and form autofill accessibility are important for other reasons, they do not define the primary criterion of Trusted Tester 4A, whose hallmark is full keyboard accessibility of all functionality.