Casualties suffering from shock typically have skin that is:Cool and dry.Cool and clammy.Hot and dry.Hot and clammy.

In cases of shock, particularly in medical contexts, it's essential to recognize the physiological changes that occur in a person's body. Shock can be classified into various types, e.g., hypovolemic shock from blood loss or septic shock from infection, but they often share common symptoms.

Typically, casualties suffering from shock present with skin that is cool and clammy. This occurs because, during shock, the body prioritizes blood flow to vital organs, redirecting it from the extremities (like hands and feet). As a result, the skin temperature can drop, making it feel cool to the touch. The clamminess arises from sweat production as the body responds to stressors and changes in blood volume or pressure.

Thus, among the options provided, the correct answer for casualties suffering from shock is Cool and clammy.