What Discovery First Demonstrated That Color Is in the Eye

Multiple Choice

What discovery first demonstrated that color is in the eye and brain,not in the light itself?​

A) Measurements of brain activity as people looked at various colors
B) ​The inability of some people to distinguish red from green
C) ​The chemical isolation of three types of cones in the retina
D) ​The way a prism separates white light into several types of light