Which of the following are types of computer mice?

• A. Mechanical
• B. Optical
• C. Trackball
• D. All of the above

Answer: (D)

Types of computer mice include various motion-sensing methods and form factors: mechanical mice use a rolling ball to detect movement with internal rollers, optical mice rely on light and a sensor to track motion, and trackball mice stay in one place while you roll a ball to move the cursor. Because each item describes a distinct way to implement a mouse, all of the above is the correct choice.