Which of the following best explains how a scanning electron microscope is used to produce an image of a specimen? (4 points) a
An electron beam strikes the specimen, is absorbed by the specimen, and is used to produce an electrically charged image on a screen.

b
An electron beam passes over the specimen's surface and displaces electrons, which are then focused on a screen to form an image.

c
An electron beam traces an outline of the specimen onto a screen, and reflected electrons are collected to form the rest of the image.

d
An electron beam travels through the specimen, and as it does so it burns an image of the specimen on a screen.