What Is the Difference Between an Element and a Molecule

What is the difference between an element and a molecule?

A) Molecules may be composed of different types of atoms, whereas elements are always composed of only one type of atom.
B) Molecules are composed of only one type of atom, whereas elements are composed of different types of atoms.
C) Molecules are elements.
D) Molecules always have larger atomic weights than elements.
E) Molecules do not have electrons, whereas elements do.