When They Talk About the Copernican Principle, Philosophers and Astronomers

When they talk about the Copernican principle, philosophers and astronomers mean that:

A) the idea that Copernicus was the greatest astronomer who ever lived and the model for astronomers ever since
B) the idea that everything in the universe revolves around the Sun
C) the idea that everything in the universe rotates and revolves (i.e. has angular momentum)
D) the idea that there is nothing special about our place in the universe
E) the idea that the universe is expanding in every direction that we look