While observing slides under a microscope, Jack adjusts the microscope's mirror so that a circle of light can be seen. Which microscope is in use?

A. Light microscope

B. Electron microscope

C. Scanning electron microscope

I think the correct answer from the choices listed above is option A. The microscope that Jack used is a light microscope. This type of microscope uses slides where a sample to be observed is placed. Also, it has a light source in order to have clear observations.