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 be accurate as possible. Think before you answer.
(A)
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)