What Is the Primary Reason That a Modern Transmission Electron

What is the primary reason that a modern transmission electron microscope (TEM) can resolve biological structures as small as 2 nm,whereas 200 nm is the limit of resolution for a light microscope?

A) Diffraction of light by a light microscope distorts the image.
B) Contrast is enhanced by staining with atoms of heavy metal.
C) Electron beams have much shorter wavelengths than visible light.
D) TEM is used to visualize very thin sections of cells.