Fact 1: Viruses are so small that they can be seen only with an electron microscope.

Fact 2: Electron microscopes are needed to see viruses.

Given the two facts above, answer the question "What can viruses be seen with?" with the following options: 
- eye
 - A computer
 - magnifying glass
 - microscope
 - the skin
 - radiation
 - Chemical energy
 - glasses


 

    microscope     