She seems to ____ languages-whatever language she learns, she learns it well. [ ]

A. take an interest in

B. have a gift for

C. take advantage of

D. play a role in

根据下图得出的合理结论有（）

①如果高档耐用品在N点呈现买方市场，其替代产品需求量减少

②如果生活必需品在M点呈现卖方市场，其互补产品需求减少

③整个交换过程看，Q点处于等价交换，M、N点交换不能成功

④农副产品在M、N点弹性需求均很大

A.①③

B.③④

C.①②

D.②④