.你正在创建允许用户构建自定义图形用户界面（GUI...

A. public delegate object SortObjects(object objA, object objB); public control SortObjects(control objA, control objB);

B. public delegate control SortObjects(control objA, control objB); public object SortObjects(object objA, object objB);

C. public delegate control SortObjects(object objA, object objB); public object SortObjects(control objA, control objB);

D. public delegate object SortObjects(control objA, control objB); public control SortObjects(object objA, object objB);