Situation–Reaction:\nOn a train, you see some college students attempting to pull the emergency chain simply to get down at an undesignated point. What should you do?

Introduction / Context:
Misuse of the alarm chain delays trains and endangers safety. Passengers have a civic role, but interventions must remain lawful and safe.

Given Data / Assumptions:

• Students intend to pull the chain for convenience, not an emergency.
• You are an ordinary passenger, not security staff.
• Train staff have authority to act and document violations.

Concept / Approach:
Report through proper channels. Avoid physical confrontation that could escalate or cause injury. Ensure evidence and accountability by promptly notifying authorized personnel.

Step-by-Step Solution:

Verification / Alternative check:
Railway protocols require staff action; passenger reports enable enforcement without risking a brawl.

Why Other Options Are Wrong:
(a) Physical restraint can be unsafe and unlawful. (b) You lack authority to detain. (d) Silence condones misuse. (e) Social media posting does not ensure timely safety action and may violate privacy.

Common Pitfalls:
Confronting groups alone; focusing on recording rather than reporting.

Final Answer:
Inform the guard or train staff promptly (Option C).