Which Statement Could Be Used to Explain Why an Atom

Multiple Choice

Which statement could be used to explain why an atom is electrically neutral?

A) The atom has a nucleus consisting of protons and neutrons.
B) Electrons move in the space surrounding the atomic nucleus.
C) The atom contains an equal number of protons and electrons.
D) Two atoms of the same element can have differing numbers of neutrons.
E) All atoms contain positively charged protons and negatively charged electrons.