What are the possible explanations for the disproportionate expression of epidemiological trends in African American children?

Lack of access to adequate medical care and poor living conditions, such as those often found in inner cities, as well as a sedentary lifestyle and intense exposure to tobacco smoke and allergens such as cockroaches.
The use of insufficient controller medications.
The lack of knowledge about asthma is a major problem, as 10-15% of school-age children have undiagnosed asthma.
The asthma burden has progressively increased worldwide in terms of prevalence, cost, morbidity and mortality.
a) I and II are correct.
b) I and III are correct.
c) I and IV are correct.
d) All statements are correct.