Which of the following impacts can chemical agents have?

The correct answer highlights the diverse and severe impacts that chemical agents can have on individuals exposed to them. Chemical agents are designed to cause harm, and their effects can range widely, primarily resulting in death, injury, and temporary incapacitation.

These agents can affect different physiological systems, leading to acute health issues or long-term consequences, depending on the type and concentration of the agent used. For instance, nerve agents can cause rapid and fatal disruption of the nervous system, while blister agents can lead to severe skin injuries and respiratory problems. Temporary incapacitation refers to the ability of some chemical agents to render individuals unable to perform their duties effectively, whether through incapacitation due to respiratory distress or through psychological effects such as panic or confusion that can stem from exposure.

The other options fail to capture the full breadth of chemical agents' potential impacts. While psychological effects may occur, they are not the sole effects of chemical agents. Additionally, physical training lethargy and enhanced communication do not align with the intended effects of these harmful substances and suggest outcomes that are not typical responses to chemical exposure.