The Expansion of the Universe Takes Place

The expansion of the universe takes place:

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