对于下述语句,若将10赋给变量k1和k3,将20赋给变量k2和k4,则应按方式()输入数据.下面是程序
intk1,k2,k3,k4;
scanf("%d%d",&k1,k2);
scanf("%d,%d",&k3,k4);
A.1020B.102010201020
C.10,20D.102010,2010,20
为什么是D啊?