struct complex { int real,unreal ;} datal={1,8},data2;

struct complex { int real,unreal ;} datal={1,8},data2;
则以下赋值语句中的错误的是
A）data2=data1; B）data2=(2,6);
C）data2.real1=data1.real; D）data2.real=data1.unreal;