Which of the following resolution modes, by design, provides the BEST possible visual quality on a flat screen LCD monitor?

SVGA (800x600) is a low-resolution standard that is almost certainly below the native resolution of any modern flat panel LCD, resulting in a blurry scaled image.

Digital refers to the signal type (as opposed to analog VGA) used to connect the monitor and is not a resolution mode - it does not by itself determine visual quality.

XGA (1024x768) is another resolution standard that, unless it happens to match the panel's native resolution, will produce a scaled and therefore lower-quality image.

LCD panels have a fixed grid of physical pixels, and native resolution maps one image pixel to one display pixel with no interpolation or scaling required. Any other resolution causes the display to scale the image up or down, introducing blurring and softness. Native resolution is therefore the only mode that delivers perfect pixel-for-pixel clarity on a flat panel display.