Which of these statements about light microscopes and electron microscopes is not true? a.) you can use light microscopes to observe both living and nonliving cells; you can use electron microscopes to observe only nonliving cells. b.) light microscopes use visible light rays; electron microscopes use beams of electrons. c.) preserving and staining samples for use with light microscopes is necessary; preserving and staining samples for use with electron microscopes is optional.