[单项选择]　　Disease is a fluid concept influenced by societal and cultural attitudes that change diachronically in response to new scientific and medical discoveries. Historically, doctors defined a disease according to a cluster of symptoms, and Live as their clinical descriptions became more sophisticated, they started to classify diseases into separate groups, so that from this medical taxonomy came new insights into disease etiology. Before the 20th century, schizophrenia and syphilitic insanity were treated as the same disease, but by early 1900 it became evident that psychoses without associated dementia represented a separate disease for which the term schizophrenia was then coined. The definition of schizophrenia continues to evolve from the psychiatric disease of the 1960s to an illness with a suspected genetic etiology, though the existence of such an etiology remains uncertain. While an optimistic hunt is still on for the genes involved, we must continue to define schizophrenia in ter
A. A disease which resisted traditional methods of classification, but has been served well by modern methods of classification
B. A disease which has resisted modern methods of classification, and continues to require a traditional method of classification
C. A disease which satisfies modern methods of classification best, but which scientists prefer to classify through a traditional method
D. A disease which satisfies traditional methods of classification best, but which scientists prefer to classify through a modern method
E. A disease which may be defined equally well by modern methods of classification as by traditional ones