Which of the following statements is true regarding secondary fragmentation?

The correct choice states that secondary fragmentation includes any nearby debris and primary fragmentation. This is accurate because secondary fragmentation refers to materials that can be propelled by an explosion, including both the projectiles that are created from the explosive device itself and any other objects that are nearby, which can be struck or propelled as a result of the explosion. Secondary fragmentation can exacerbate the overall damage and injuries caused during an explosive event, as it introduces additional, unpredictable hazards that are not present in the primary fragmentation alone.

This concept is essential in fields such as explosive ordnance disposal, military operations, and disaster response as it impacts how one must assess the risks and potential injuries associated with an explosive blast. Understanding that secondary fragmentation involves a broader category of materials helps responders to be more prepared for the hazards that may arise from an explosion.