People respond to stress with greater anxiety if they have

A) a weak ego.
B) an internal locus of control.
C) positive character traits.
D) a reactive autonomic nervous system.

A reactive autonomic nervous system means a stronger physiological response to stress, which can lead to increased anxiety. A weaker ego or positive character traits may provide some resilience against stress, and having an internal locus of control may result in greater feelings of control and reduced anxiety in stressful situations. However, a reactive autonomic nervous system is the most directly related to increased anxiety in response to stress.