Concept:"Commotion" means a sudden noisy, confused disturbance among people, as when a crowd starts pushing and shouting.
Solution:In the sentence, the commotion at the stadium is the disorder and confusion in the crowd that could have been avoided.
Of the options, "confusion" (disorder, lack of order) is nearest in meaning.
A. "trouble" is too general; it can mean any problem or difficulty.
C. "issue" means a topic or problem to be discussed, not a disturbance.
D. "violence" means physical force to hurt people; a commotion can happen without violence.
Key point: Pick the option that matches the core meaning (noisy disorder), not something that might only result from it.
Answer:Option B (confusion)