Which statement is the best description of the current view of how colour is coded in the visual system

A)  It starts as an opponent process and then switches to a trichromatic process. 
B)  It starts with rods and then switches to cones. 
C)  It begins with cones and then switches to rods. 
D)  It begins with a trichromatic process and then switches to an opponent process.

Trichromatic Process

A theory of color vision that proposes three types of color receptors in the eye, each sensitive to red, green, or blue.

Opponent Process

A theory suggesting that emotions are regulated by mechanisms that operate in opposition to each other.

Visual System

The part of the central nervous system which enables organisms to process visual detail, including the eyes, optic nerve, and brain areas responsible for visual perception.