What are two common switch types used for AAC input, and what design considerations ensure reliable access?

• A. Touch screens and keyboards; considerations include screen size and keyboard layout.
• B. Voice control and eye-tracking; considerations include ambient noise and gaze direction.
• C. Puff/sip switches and mechanical micro-switches; considerations include sensitivity, response time, durability, placement, feedback, and minimizing false activations.
• D. Joystick and trackball; considerations include weight and color.

Answer: (C)