Q: Objects that are a few nanometers in size can be seen only with:\nOptions:\n- (A) an electron microscope\n- (B) refraction of light\n- (C) matter vibrating\n- (D) ultrasound\n- (E) The bending of a ray of light\n- (F) slight magnification\n- (G) flashlights\n- (H) lens
Let's think step by step below.

User
Viruses are so small that they can be seen only with an electron microscope. Viruses Viruses are very small, a few nanometers in size. Objects that are only a few nanometers in size can be seen only with an electron microscope.
Thus, the answer is (A).
Assistant