Which assessment finding for a client who is anxious indicates sympathetic nervous system stimulation?

The assessment finding indicating sympathetic nervous system stimulation is skin pallor. During times of anxiety or stress, the body activates the sympathetic nervous system as part of its "fight or flight" response. This activation leads to the constriction of blood vessels in certain areas, including the skin, which can result in pallor or a pale complexion. The reduced blood flow to the skin is a physiological response intended to prioritize blood flow to vital organs and muscles, preparing the individual for rapid physical activity in response to perceived threats.

The other options do not represent sympathetic nervous system stimulation. Dry skin can be a result of various factors but does not specifically indicate sympathetic activation. Pupil constriction is related to the parasympathetic nervous system, which promotes rest and relaxation rather than stress responses. Bradycardia, or a slowed heart rate, also signifies parasympathetic dominance, as the sympathetic system typically leads to an increased heart rate during anxiety or stress. Thus, skin pallor distinctly aligns with the sympathetic activation expected during anxious states.