45. How does the author sound in the concluding sentences of this article?
(A) humorous and teasing
(B) reserved and advisory
(C) positive and encouraging
(D) frustrated and angry
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統計: A(26), B(131), C(16), D(51), E(0) #3017873
統計: A(26), B(131), C(16), D(51), E(0) #3017873