What is this talk mainly about

A．How historical events affected an art movement.

B．How artists can influence economic conditions.

C．Why a certain art movement failed to become popular.

D．How valuable paintings were lost during wartime.

在进出口贸易中，若卖方交货数量多于合同规定的数量，根据《联合国国际货物销售合同公约》的规定，买方可以（）。

A、只接受合同规定的数量，而拒绝超过部分

B、接受合同规定数量以及超出合同规定数量的一部分

C、拒绝全部货物

D、接受全部货物