42. How does the author conclude the passage in the last paragraph?
(A) By adding new details.
(B) By predicting future development.
(C) By summarizing the main points.
(D) By giving advice to the general public.
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統計: A(12), B(17), C(61), D(15), E(0) #3362520
統計: A(12), B(17), C(61), D(15), E(0) #3362520