Which is the best example of how inadequate access to healthcare can cause health disparities?

A. A belief that annual checkups and preventative medicine are a waste of time and that doctors should be seen only for extreme emergencies
B. A lack of understanding of the health care industry, how health insurance works, or why preventative care and treatment are both important
C. An inability to pay for health care costs such as deductibles and premiums due to low wages or inadequate health insurance coverage
D. A shortage of doctors, hospitals, and clinics available within a reasonable traveling distance or with flexible hours open to patients​