Which of the following is NOT tree about the American Revolution().

A.It was not a sudden and violent overturning of the political and social framework.

B.It heralded the birth of three modern nations.

C.It was not so revolutionary as one might suppose.

D.It makes all the states completely independent from British king and Parliament.

现在商品广告充满了媒体。有的广告夸大其词肆意吹嘘自己的产品，而对别人的产品则乘机贬低。对此，经济学家指出，产品不能永远靠广告来支撑。经济学家的观点说明（）

①广告在产品推销、树立企业形象等方面不起作用

②企业树立自己的形象最根本的是靠其产品的质量和优质的服务

③企业只要有优质的产品，就能在竞争中取得胜利

④企业的产品要能真正走向市场，既要靠广告宣传，更要靠产品质量

A.①②

B.③④

C.②④

D.①③