The correct answer is: C. Remain always above the horizon.
Circumpolar stars are stars that are always visible in the night sky from a particular location on Earth. This is because they are located in a circular region around the celestial pole, which is the point in the sky directly above the North Pole or South Pole. As the Earth rotates on its axis, the stars appear to move across the sky in a circular motion. However, circumpolar stars remain in the same position relative to the horizon, and so they are always visible.
Option A is incorrect because circumpolar stars do not rotate around the North Pole. They rotate around the celestial pole, which is a point in the sky directly above the North Pole.
Option B is incorrect because circumpolar stars do not rotate around the celestial pole. They rotate around the Earth’s axis, which is an imaginary line that runs through the North and South Poles.
Option D is incorrect because circumpolar stars are often seen near the pole star. The pole star is the star that is located closest to the North Pole. It is a circumpolar star, and so it is always visible from the Northern Hemisphere.