The market for health insurance is characterized by asymmetric information because:
A. Sellers of health insurance know more than buyers do about buyers' overall level of health.
B. Buyers of health insurance know more about their overall level of health than sellers do.
C. Insurance companies cannot refuse health insurance to any buyer.
D. There are more unhealthy people covered by health insurance than there are healthy people.
E. The demand for health care is very inelastic