45.What does the underlined word viable mean in the last paragraph of the passage?
(A) feasible
(B) awkward
(C) improbable
(D) excruciating
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統計: A(276), B(6), C(20), D(17), E(0) #3100045
統計: A(276), B(6), C(20), D(17), E(0) #3100045