Sorry, the correct answer is "C".

When hammering, always wear either impact goggles or safety glasses with side shields.

Both impact goggles and safety glasses with side shields will protect your eyes from ricocheting nails. Their polycarbonate lenses resist shattering. Regular eyeglasses, especially with their current smaller frame styles, can allow objects to enter from the side and their lenses can shatter under impact. Wear impact goggles over your regular glasses. Besides, which would you rather scratch, your expensive eyeglasses or your $3.49 impact goggles?