Why Is Specialization in Medicine Problematic

Why is specialization in medicine problematic?

A) Physicians are shouldered with the burden of the costs and times for additional training.
B) Specialization reduces practitioners' abilities to refine their skill and knowledge base on key areas of health care.
C) Specialists earn less money than primary care physicians and provide lower quality care despite rising need among patients.
D) Referral requirements cause backlogs and long waits for needed care, more patients need comprehensive care, far higher health care costs.