The correct answer is A. Raster scanning.
E-beam machines use a focused beam of electrons to create images on a variety of materials. The beam is scanned across the surface of the material in a raster pattern, similar to the way a television screen is scanned. The intensity of the beam is varied to create different shades of gray or color.
Raster scanning is a more efficient process than vector scanning, which is another method that can be used to create images with an e-beam. In vector scanning, the beam is moved directly from one point to another, following the lines of the image. This can be a slow process, especially for complex images. Raster scanning is faster because the beam can be moved in a series of straight lines, or scan lines, across the image.
None of the other options are correct. Option B, vector scanning, is not the process used in E-beam machines. Option C, raster & vector scanning, is not a valid option. Option D, none of the mentioned, is not the correct answer.