本题考查《台湾关系法》的内容。

But soon after the establishment of diplomatic relations, Congress, supported by the Carter Administration, adopted the Taiwan Relations Act which, in words and spirit, violates the spirit of the agreement for the establishment of diplomatic relations.

但是建交之后不久，国会在卡特政府支持下通过了《台湾关系法》，该法案从内容到精神都违背了建交协议的精神。故选A。