Utilitarianism, in reference to economic fairness, refers to the idea that:（）

A. the greatest good occurs when wealth is equalized.

B. the greatest utility of production and consumption results from competitive markets.

C. equality of opportunity is an important measure of economic fairness.

有关风湿热的次要表现，以下哪项不正确（）

A.发热

B.皮下结节

C.关节酸痛

D.血沉加快

E.有风湿热既往史