32. In comparing the United States government’s definition of services with the classical definition, the author suggests that the classical definition is (A) more pragmatic (B) more difficult to apply (C) less ambiguous (D) more widely used (E) more arbitrary 为什么答案是B,不是C, 原文26行不是说Such ambiguities reveal the arbitrariness of this definition吗,取非不就是C了吗?谢谢