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Which one of the following statements is not true regarding resonance structures of a given molecule?

(A) All resonance structures must have the same number of electrons.

(B) All resonance structures must have the same arrangement of atoms.

(C) Each atom in all of the resonance structures must have a complete shell of valence electrons.

(D) All resonance structures must be valid Lewis structures.

(E) The resonance structures may have different energies.