Respuesta :
C is the correct answer. Electron microscopes require a vacuum to work, so living cells cannot be seen because they cannot respire. Light microscopes use a ray of visible light instead of a beam of electrons to magnify something so it can be seen by the naked eye. There are two different types of electron microscope: transmission (TEM) and scanning (SEM).
C is the correct answer because electron microscopes can’t be used to view living specimens because the methods used to prepare them for viewing kills cells.