What factors influence the vertical resolution of a monitor?

The vertical resolution of a monitor is primarily influenced by line spacing and spot size. Line spacing refers to the distance between lines of pixels on the display, which affects how many lines can fit into a given vertical space. A smaller line spacing allows for more lines of pixels, thereby increasing the vertical resolution.

Spot size, on the other hand, relates to the physical size of the individual pixels or dots that compose the image on the monitor. Smaller spot sizes can produce finer details, enhancing the perceived vertical resolution since more dots can be packed into the same vertical area.

While bandwidth is important for overall image quality and data transmission, it does not directly impact vertical resolution in the same way that line spacing and spot size do. Hence, the correct option focuses on the factors that have a direct effect on the number of vertical lines that can be displayed.