Final answer:
In photography, the aperture value f/5.6 allows the most light to enter the camera compared to f/11, f/16, or f/22; f/5.6 corresponds to a wider aperture.
Step-by-step explanation:
In photography, the amount of light that enters the camera is controlled by the aperture, which is measured in f-stops. The f-number decreases with a wider aperture, allowing more light to reach the image plane. Out of the given options, the one that lets in the most light is A) 3 stops; f/5.6 because a lower f-number corresponds to a larger aperture, thus letting in more light than f/11, f/16, or f/22.