Answer:
Separate cells since they are kept at the distance more than the resolution of the microscope.
Step-by-step explanation:
Resolution represents the minimum distance between two points or two objects that is required to be maintained to observe them as two separate objects under a microscope. In the given example, two cells are kept at a distance of 320 nm and are observed using a microscope with a resolution of 300 nm. This means that these two cells and any other objects that are kept at the distance more than 300 nm will be observed as separate cells/object under this microscope.