The periphery of the eye is excellent at detecting a small flash of light in the dark but less able to distinguish changes in the strength of an existing light. If we think about this in terms of thresholds, what can we conclude?
a. The periphery of the eye has a low threshold for detecting small flashes of light in the dark.
b. The periphery of the eye has a high threshold for distinguishing changes in the strength of an existing light.
c. The periphery of the eye has a low threshold for detecting changes in the strength of an existing light.
d. The periphery of the eye has a high threshold for detecting small flashes of light in the dark.