Final answer:
The right side of Andy Warhol's Marilyn Diptych features a grid of 25 black and white silkscreened photographs of Marilyn Monroe, representing her mortality and the fading of her image.
Step-by-step explanation:
The subject matter on the right side of the Andy Warhol's Marilyn Diptych painting is a grid of 25 silkscreened photographs of Marilyn Monroe. Unlike the left side which features colorful images of the star, the right side of the diptych is composed of black and white images. Answering the student's question, the correct option is: 3) The subject matter on the right side is a grid of 25 silkscreened photographs of Marilyn Monroe with black and white colors. The black and white images serve as a stark contrast to the vivid colors on the left and can be seen to represent Monroe's mortality and the fading of her image after her death.