单选题 Because there exist surpluses (e. g. wheat, rice, butter) ,aid programs ______.

A、 may promote overproduction of some goods
B、 put the interests of the producers before those of the consumers
C、 could interfere with more normal types of trade
D、 will help the givers as well as the receivers

【正确答案】 D

【答案解析】[试题分析] 本题为推理判断题。
[详细解答] 从第四段Its organizers realized that it could be useful both to developed and developing countries．可知，aid programs不仅帮助了援助国，也帮助了受援国，是双方受益的。A、B项未提及，C项与文中．．．did not upset normal trading之意不符。