在C#中，下列选项用于正确初始化一个数组的有（ ）。

A. int dayhigh={24,23,24,25,25,23,21};
B. int dayhigh[]={24,23,24,25,25,23,21};
C. int []dayhigh={24,23,24,25,25,23,21};
D. int dayhigh[]=new int{24,23,24,25,25,23,21};