Which of these hypothetical observations (none of them are real) would force us to reconsider our modern, Sun-centered view of the solar system?
A) We discover that the universe is actually contracting, not expanding.
B) We discover a small planet beyond Saturn that rises in the west and sets in the east each day.
C) We find that we are unable to measure any parallax for a distant galaxy.
D) We discover an Earth-sized planet orbiting the Sun beyond the orbit of Pluto.