Which characteristics are associated with nerve agents?

Nerve agents are a class of chemical warfare agents that are particularly dangerous due to their ability to disrupt the normal functioning of the nervous system. The correct choice highlights that nerve agents are typically odorless and colorless, which makes them particularly insidious, as they can be deployed without immediate detection by most individuals. Additionally, they can rapidly penetrate through the skin or respiratory system in both liquid and vapor forms, leading to swift and severe effects on the body, including loss of muscle control and respiratory failure.

This characteristic of rapid penetration is crucial, as it emphasizes the need for prompt action in case of exposure. Recognizing these properties helps in understanding how to prevent and respond to nerve agent threats. Other incorrect options describe properties that are not associated with most nerve agents and could potentially lead to misconceptions about their nature and how to protect against them.