What Statement Accurately Defines What a Pixel Is

What statement accurately defines what a pixel is?

A) A pixel is the name for the graphical draw point of any graphics generating program.
B) A pixel is the graphical equivalent of a byte in memory, and is used to store graphics data.
C) A pixel is a graphical font, which is used to write image data onto a screen.
D) A pixel is a colored dot, also known as a picture element, that makes up part of a display.