i believe both a and b but not sure
Do you need an example or are there some written for you already?
On brainly I don't think that your supposed to tell people to do your work.
Answer:
Asthma is: A condition in which a person's airways become inflamed, narrow and swell, and produce extra mucus, which makes it difficult to breathe.
Asthma can be minor or it can interfere with daily activities. In some cases, it may lead to a life-threatening attack.
Asthma may cause difficulty breathing, chest pain, cough, and wheezing. The symptoms may sometimes flare-up.
Asthma can usually be managed with rescue inhalers to treat symptoms and controller inhalers that prevent symptoms. Severe cases may require longer-acting inhalers that keep the airways open, as well as oral steroids.