In Chapter 4 ofThe End of Poverty, Professor Sachs outlines some lessons of clinical medicine that can be applied to Development Economics. Choose the correct lessons from below:(DownloadThe End of PovertyChapter 4as a PDF.)A．The human body is a complex system.B．Complexity requires a differential diagnosis.C．All medicine is family medicine--social setting is crucial.D．Medicine is a profession, and requires strong norms, ethics and codes of conduct.