Health Care Is Dominated by Informational Asymmetry Between Consumer/patient and Producer/doctor

Health care is dominated by informational asymmetry between consumer/patient and producer/doctor because

A) the producer has knowledge that the consumer lacks.
B) the consumer has the knowledge that the producer lacks.
C) both the consumer and the producer have the same amount of knowledge.
D) both the consumer and the producer have no knowledge.
E) the producer has no knowledge at all.