Which aspects should be discussed regarding mobile control?

Focusing on the effective management of mobile control, it is essential to factor in effectiveness, safety, and the defense use of vehicles. Effectiveness pertains to how well the mobile control system functions in achieving its intended goals, such as ensuring security or facilitating emergency responses. Safety is crucial because it encompasses both the physical safety of individuals using or around the vehicle and the operational safety within the system itself.

Furthermore, considering the defense use of vehicles highlights the importance of understanding how mobile control can be applied in security contexts, especially in mitigating threats or addressing emergencies. This multi-dimensional approach ensures that all critical elements are covered, making it comprehensive for anyone responsible for security training pertaining to mobile control.

Other options lack the holistic view that option C provides. While effectiveness and cost are important, excluding safety and defense use overlooks essential aspects of operational capability. Similarly, safety and speed alone do not address the broader context of mobile usage in a security setting. Lastly, while legalities and compliance are important, they do not capture the operational aspects needed for effective mobile control.