Final answer:
The most suitable nurse's response is to warn the client with malignant hypertension about the risks of cold weather causing blood vessel constriction and thus raising blood pressure. Option c.
Step-by-step explanation:
The best response by the nurse to a male client with malignant hypertension who enjoys downhill skiing would be "Cold weather may constrict your blood vessels raising your blood pressure." This is based on the fact that during exposure to cold weather, the body's thermoregulation mechanisms constrict dermal blood vessels to minimize heat loss, which could increase blood pressure, posing a risk for someone with malignant hypertension.
While exercise is generally beneficial and can lower the risk of heart attack, the physical exertion and cold temperatures associated with downhill skiing could be dangerous for someone with this condition. It is important for individuals with hypertension to engage in moderate, safe kinds of physical activity that do not pose additional risks, and it is essential that this advice is tailored to their specific health status.