Final answer:
The nurse assesses the resistance stage of the general adaptation syndrome based on reduced physiological reactions compared to the alarm reaction stage but signs of being prepared to manage the stressor.
Step-by-step explanation:
The nurse would assess that a client is experiencing the resistance stage of the general adaptation syndrome based on certain observations. During the resistance stage, the body has adapted to the stressor but remains on alert and prepared to respond. The nurse might notice that the client exhibits reduced physiological reactions compared to the previous alarm reaction stage but still shows signs of being prepared to manage the stressor, though with less intensity.