Which of the following IED indicators suggests a potential threat when examining a suspected IED?

When evaluating potential threats associated with suspected improvised explosive devices (IEDs), various indicators can signify an imminent risk. The inclusion of multiple options in this case highlights that various components can present threats.

An exposed antenna may be a sign of remote detonation capabilities, suggesting that someone might be controlling the device from a distance. This is a common feature in many IED designs, making it a significant indicator of a potential threat.

Concealed wires indicate that there are connections within the device that may lead to an ignition source or other functional components. If wires are concealed, it suggests a level of sophistication in the IED's design meant to avoid detection, which is a critical factor when assessing potential risks.

Batteries are also critical because they provide power to the device. The presence of batteries might indicate that an energy source is necessary for detonation, making them a vital component to investigate in any suspected IED.

Recognizing that all these components—exposed antennas, concealed wires, and batteries—serve as indicators of potential threats, the answer that encompasses all viable indicators reflects a comprehensive understanding of how IEDs may be constructed and detected. This is essential knowledge for personnel trained to identify and mitigate risks associated with IEDs.