Which chapter of TC 21-305-20 addresses chemical, biological, radiological, and nuclear operations?

The correct choice is linked to Chapter 15 of TC 21-305-20, which specifically addresses chemical, biological, radiological, and nuclear (CBRN) operations. This chapter is critical as it outlines the procedures, protective measures, and tactical considerations necessary for effectively managing and mitigating risks associated with CBRN threats. Understanding this chapter is essential for training and preparing personnel to respond adequately to various CBRN scenarios, which can significantly impact operational effectiveness and safety.

The focus of Chapter 15 is on ensuring that personnel are well-prepared and informed about potential CBRN hazards and how to operate under such conditions, thereby enhancing survivability and mission success in challenging environments.