Overlap most commonly refers to which concept?

• A. a shared area of responsibility or interest
• B. the amount in which two things cover a shared area
• C. the period of time when two different things are occurring
• D. none of the above

Answer: (B)

Overlap is about the extent of shared coverage between two things—the portion where they coincide. That makes the option describing the amount they cover in common the best fit. It’s not just that there is a shared area or interest (which A implies); overlap emphasizes how much of that area is actually shared. Timing can relate to overlap in some cases, but the most typical sense is the measurable amount of common coverage, which is what the correct choice captures. D isn’t needed because there is a precise concept that matches.