According to John Locke:
1. Primary qualities (e.g., size, shape) are directly perceivable and exist in objects.
2. Secondary qualities (e.g., color, taste) depend on perception and exist subjectively in the observer.
3. The powers in objects that produce ideas in us are termed qualities (Option B).
4. Primary qualities are perceptible by multiple senses (Option C), while secondary qualities rely on a single sense (Option D).
Option (A) is incorrect because Locke states that our ideas are not exact images of external objects; they represent how objects affect our senses.