What is the reason for positioning our eyes at a short distance away from the eyepiece when viewing through a compound microscope, and how does this distance relate to the concept of the 'eye-ring'?

Options

1. AIt reduces glare and discomfort during microscopy.
2. BIt allows for better focus adjustment.
3. CIt ensures that all the light refracted by the objective is collected.
4. DIt enhances the magnification of the microscope.