What explosive substance is commonly associated with a type of VBIED?

The substance commonly associated with a type of Vehicle-Borne Improvised Explosive Device (VBIED) is Urea Nitrate. This explosive is particularly notable due to its potential for high explosive yield when combined with other materials. Urea Nitrate is often chosen for its availability and ease of manipulation in the creation of improvised explosives, making it a popular choice among those devising VBIEDs.

Urea Nitrate can be readily produced using commonly available chemicals, which makes it attractive for those looking to construct explosives without sophisticated resources. It offers a combination of high explosive power and relative stability, which is crucial for its intended use in a VBIED scenario.

This choice aligns with observed trends in the use of improvised explosive devices, where materials that can be synthesized from commonly found substances tend to be favored for their accessibility. Other options do not typically align with common VBIED construction methods or do not possess the same explosive characteristics when used in this context.