Which statement describes the Milky Way galaxy and Earth's position in it?
A. It has a central core surrounded by a spherical halo of stars, and
Earth is inside the core.
B. It has a central core surrounded by a spherical halo of stars, and
Earth is in the halo.
O C. It has a central core around which its spiral arms spin, and Earth is
in one of those arms.
D. It has a central core around which its spiral arms spin, and Earth is
inside the core.