How do you know if a picture was taken from a light microscope or an electron microscope?

See if the image is 3D. if it is, it is an SEM

SEMs tend to provide detailed images

C) No, because their work has not been reviewed by other scientists.

Explanation:

Although the experiment that Trey and Randall conducted does have a lot of the qualities that are needed in this type of scientific experiment, it would still not be considered valid scientific research. The two are missing an important step that is necessary for the research to be valid. They need to present their work to other scientists, who will then review it as well. This process is called peer-review and is an essential element of legitimate scientific research.