Final answer:
To prevent asthma exacerbations, one should avoid environmental triggers and use a daily controller medication to manage inflammation and the likelihood of attacks.
Step-by-step explanation:
The two best ways to prevent an asthma exacerbation are d. Avoid triggers and use a controller daily. Avoiding triggers is crucial as environmental factors like allergens, smoke, and pollution can lead to an asthma attack. Using a daily controller medication, typically corticosteroids, can help manage inflammation and reduce the likelihood of an asthma attack. While medications like albuterol are used for quick relief during an attack, they are not as effective in preventing future exacerbations.