What does the Gestalt principle of proximity state

A)  Figure and ground can be ambiguous. 
B)  Objects nearer to each other are seen as forming a unit. 
C)  Bottom-up processing is more likely with close items. 
D)  Centre-surround cells that are closer fire more often.

Proximity

The physical or psychological nearness or closeness between people, objects, or concepts, which can influence interactions and perceptions.

Gestalt Principle

A theory in psychology that proposes the human brain sees objects as whole forms rather than as a collection of individual parts.

Bottom-Up Processing

A way of processing information in which the system builds up to a complete perception starting from individual pieces of sensory information.