Which group contains hazardous materials that may be authorized on a passenger-carrying bus when applicable conditions are satisfied?
Correct answer: C – Small-arms ammunition and emergency shipments of drugs, chemicals, and hospital supplies
Federal rules identify small-arms ammunition and emergency shipments of drugs, chemicals, and hospital supplies among the limited hazardous materials authorized on passenger-carrying vehicles. The authorization is subject to conditions, including whether another practicable means of transportation is available. Separate quantity, storage, and material-specific restrictions also apply.
Source: 49 CFR § 177.870(b), (d)-(g) — Regulations for passenger carrying vehicles

