Advisors, Inc. , is in the process of adopting the Global Investment Performance Standards (GIPS). The managers of the firm are combining the results of fee - paying discretionary portfolios into composites for reporting purposes. For purpose of comparison, each fee - paying discretionary portfolio must be included in at least:（）

A. two composites.

B. one composite.

C. three composites.

城管普遍面临的困境是：管，则冲突四起；不管，则乱象丛生。而下述漫画则做到了二者的和谐。这给我们的启示是（）。

①政府应坚持依法执政

②公民应支持政府的工作

③政府坚持权为民所用、利为民所谋

④公民应积极管理政府事务

A.①②

B.②④

C.②③

D.③④