You are presented with the question "Objects that are a few nanometers in size can be seen only with:" and the following answer choices: - an electron microscope - refraction of light - matter vibrating - ultrasound - The bending of a ray of light - slight magnification - flashlights - lens Now knowing that viruses are so small that they can be seen only with an electron microscope and viruses Viruses are very small, a few nanometers in size, choose the best answer.
an electron microscope