What Is the Major Difference Between TEM and SEM

What is the major difference between TEM and SEM?

A) TEM uses light waves and electrons while SEM uses only electron beams.
B) TEM uses electromagnetic condenser lens as well as an electromagnetic objective lens while SEM uses only 2 electromagnetic lenses.
C) TEM uses a projector lens while SEM uses a photomultiplier.
D) TEM projects a 2-dimensional cross section of a microbe while SEM projects a 3-dimensional image with surface details.