单选题

如果输入8，4 ，下列程序的运行结果是#include <stdio.h>int main(){ int a,b,t;scanf("%d，%d",&a,&b);if(a<b){t=a;a=b;b=t;}while(a%b!=0){ t=a%b;a=b;b=t;}printf("%d",b);return 0;}

Question

A. 32

B. 16

C. 8

D. 4