Which of the following is a sign of inadequate circulation?

A sign of inadequate circulation is indicated by pale or cool extremities. When there is insufficient blood flow to a particular area, the skin can lose its color and warmth, resulting in a pale or cool appearance. This happens because blood is essential for supplying oxygen and nutrients to tissues, and when circulation is compromised, those areas may not receive adequate supply, leading to noticeable changes in skin color and temperature.

In contrast, warm skin suggests adequate circulation, as warm skin typically indicates good blood flow. A capillary refill time of less than 2 seconds is generally a sign of healthy perfusion, indicating that blood is returning quickly to the capillaries after transient occlusion. Additionally, a strong pulse is indicative of good cardiovascular function and adequate blood circulation, as it reflects the pressure of blood flowing through the arteries. Therefore, pale or cool extremities clearly highlight issues with circulation, making it the correct answer.