Which description matches the stadium paradox?

• A. Two rows of moving objects appear to contradict assumptions about equal times and distances.
• B. A paradox claiming motion is impossible because space is continuous.
• C. A paradox about summing infinite series.
• D. A paradox about patience during delays.

Answer: (A)

The stadium paradox explores motion by having two rows of bodies move past each other in opposite directions. When you analyze how long it takes for one row to completely pass the other and compare that to the times it takes individual members to pass a fixed point, you can get a seeming contradiction about equal times and equal distances. That tension—two rows of moving objects appearing to clash with simple assumptions about time and distance—fits the description best. It isn’t about motion in continuous space being impossible, nor about summing infinite series, nor about delays—those describe different ideas.