What sign text is posted at entry points to warn about explosives training?

• A. Danger Explosives Dog Training in Progress, Keep Out
• B. Explosives Training in Progress; Authorized Personnel Only
• C. Warning: Explosives Area
• D. Keep Out: Explosives in Use

Answer: (A)

Signs at entry points should clearly convey immediate danger, specify the hazard, and instruct not to enter. Using “Danger” communicates a higher level of risk than “Warning,” which helps deter entry in real-time situations. Saying “Explosives Dog Training in Progress” makes the exact activity and hazard unambiguous, so anyone approaching understands why the area is off-limits. Finishing with “Keep Out” gives a direct, actionable instruction to unauthorized personnel.

This combination is the strongest because it leaves little room for misinterpretation and aligns with safety signage norms in explosive-related work. Other options may use a less urgent term, omit a clear keep-out directive, or fail to specify the exact activity, which reduces their effectiveness in preventing entry during sensitive training.