Which statement best describes exposure in the cardinal principle?

• A. The color of PPE used.
• B. The number of people, length of time, and amount of explosives or chemical agents to which someone is exposed.
• C. The handler's shift schedule.
• D. The route chosen to transport explosives.

Answer: (B)

Exposure in the cardinal principle refers to how much hazard someone could come into contact with, captured by three factors: how many people could be exposed, for how long they could be exposed, and how much explosive or chemical agent is involved. This framing directly addresses the level of risk and informs protective measures, since you want to limit the number of people exposed, shorten the exposure duration, and reduce the quantity of material involved. The other ideas—PPE color, a handler’s shift schedule, or the route of transport—do not define exposure to the hazard itself.