The Young-Helmholtz theory _______________.
|  | 
   |  | is a theory of night vision; | 
   |  | is a theory about rod function; | 
   |  | is a tri-chromatic theory about the role of cones in color vision; | 
   |  | is based on opponent-processing; | 
   |  | none of the alternatives provided are correct; | 
   INCORRECT - The Young-Helmholtz theory addresses color vision in bright light.
   
    
    
   
   
   [Review Part 1 of the tutorial]
   [Review Part 2 (Matching) of the tutorial]