Which of the following is a primary method of initiation for IEDs?

• A. Timed (time delay)
• B. Victim-operated
• C. Command
• D. Remote detonation

Answer: (A)

The idea being tested is why certain initiation methods are more commonly used to trigger IEDs. Timed, or time-delayed, initiation is the best answer because it lets the device be planted and left in place, with detonation occurring after a preset interval. This gives the attacker control over when the blast happens without needing to stay near the device, reducing personal risk and increasing the chance that detonation occurs at the intended time or location.

Other methods rely on a victim to trigger the device, a direct command signal, or a remote control. These require the attacker to be involved at the moment of detonation or to maintain a signal, which can be more difficult to execute reliably and can expose the attacker to greater risk. Timed initiation sidesteps that need, making it a more practical and commonly used primary approach.