Which statement best describes the progression of MOPP levels from 0 to 4?

Which statement best describes the progression of MOPP levels from 0 to 4?

• A. 0: no threat; 1: suspected threat; 2: possible threat; 3: probably threat; 4: imminent threat
• B. 0: safe; 1: watchful; 2: alert; 3: danger; 4: emergency
• C. 0: none; 1: slight; 2: moderate; 3: high; 4: critical
• D. 0: minimal threat; 1: low threat; 2: medium threat; 3: high threat; 4: extreme threat

Answer: (A)

MOPP levels depict an escalating threat posture that guides how much protective gear you prepare to wear. Level 0 means normal operations with no threat. As the situation changes, the descriptors move up in certainty: level 1 signals a suspected threat, level 2 a possible threat, level 3 a probable threat, and level 4 an imminent threat. This sequence—no threat to imminent threat—fits the way the posture scales with increasing risk and corresponding readiness. Other options use different wording for threat intensity, but they don’t align as precisely with the standard progression from no threat to imminent threat.

MOPP levels depict an escalating threat posture that guides how much protective gear you prepare to wear. Level 0 means normal operations with no threat. As the situation changes, the descriptors move up in certainty: level 1 signals a suspected threat, level 2 a possible threat, level 3 a probable threat, and level 4 an imminent threat. This sequence—no threat to imminent threat—fits the way the posture scales with increasing risk and corresponding readiness.

Other options use different wording for threat intensity, but they don’t align as precisely with the standard progression from no threat to imminent threat.