Why Is It Easier to See Fine Print in Brighter

Multiple Choice

Why is it easier to see fine print in brighter light than in dimmer light?

A) This is not so, it is easier to see fine print in dimmer light than in brighter light.
B) Because the refractive power of the eye increases as the light intensity increases.
C) In brighter light, the f-number of the eye increases.
D) In brighter light, the longer wavelengths dominate.