80 在圖3a中，若更改add函式裡面的int s=6;這一行改為static int s=6;請問執行結果為何？#includeint s=1;//全域變數void add(int);int main(){printf("%d",s);add(s);add(s);printf("%d",s);s++;printf("%d",s);return 0;}void add(int a){int s=6;for(;a>=0;a--){printf("%d",s);s++;printf("%d",s);}}圖3a (A) 1,6,7,7,8,6,7,7,8,1,2 (B) 1,6,7,7,8,8,9,9,10,1,2 (C) 1,6,7,7,8,8,9,9,10,10,11 (D) 1,1,2,2,3,3,4,4,5,5,6