Cardiovascular endurance/fitness
Answer:
At the moment I can only think of one which would be to make sure if the couple was to have a child, the child would not have higher chances of obtaining a disease.
Explanation:
The answer is D it sounds more relevant than the rest
Depending on which kind (COPD, MS, Asthma) determines the answer. It could be an inhaler, oxygen, antibiotics, managing the symptoms, steroids etc.
If its hot dont push yourself! if you feel dehydrated or out of breath maybe even light headed, sit down and drink water get your elctrolights up