The Expansion of the Universe Takes Place

The expansion of the universe takes place:

A) only over distances about the size of a galaxy or larger; consequently, the Milky Way Galaxy expands, but the solar system does not.
B) only between objects separated by a vacuum; as a result, our bodies do not expand, but the Earth-Moon system does.
C) between all objects, even between the atoms in our bodies, although the expansion of a person is too small to be measured reliably.
D) primarily in the huge voids between clusters of galaxies. "Small" objects like galaxies or Earth do not expand.