Final answer:
The planet that would show the least variation in its distance from the sun would be one with a nearly circular orbit. A nearly circular orbit means that the planet's distance from the sun remains relatively constant throughout its orbit.
Step-by-step explanation:
The planet that would show the least variation in its distance from the sun would be one with a nearly circular orbit (Option D).
A nearly circular orbit means that the planet's distance from the sun remains relatively constant throughout its orbit.
This is in contrast to a highly elliptical orbit (Option C), where the planet would experience significant variation in its distance from the sun.