Which term refers to any item designed to prevent detection of stolen merchandise by a retail theft detector, including metal-lined or foil-lined bags and tools used to remove a security tag?

• A. Shielding or deactivation instrument
• B. Retail theft detector
• C. Security tag remover
• D. Alarm device

Answer: (A)

The term covers any item meant to defeat a retail theft detector, whether by shielding the merchandise from the detector or by disabling the security tag. Metal-lined or foil-lined bags physically block the detector’s sensors, helping a thief pass through undetected. Tools used to remove a security tag directly undermine the tag’s amplification or tracking, potentially allowing theft to go unnoticed. Because this single term encompasses both shielding devices and tag-deactivation tools, it best fits the description in the question. The other terms describe either the detector itself, a tool that only removes tags, or an alarm device, none of which capture the full idea of items designed to prevent detection.