Which of the following procedures would allow you to make a spectrum of the sun similar to the one shown, though with less detail?

a) pass a narrow beam of sunlight through a prism.
b) take a photograph of the sun and then use image-processing software to change the sun's shape into a long, thin strip.
c) photograph the sun through a powerful telescope.
d) compare the relative amounts of light that the sun emits as infrared, visible light, and ultraviolet light.