The Expansion of the Universe Takes Place

Multiple Choice

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, the bodies do not expand, but the Earth-Moon system does.
C) between all objects, even between the atoms in the 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.