下面程序段的输出为（    ）int a=15, b=10, c=20, d;d = a > 12 ? b : c;switch(d){        case 5: printf("%d,", a);        case 10: printf("%d,", b);        case 20: printf("%d,", c);        default: printf("#");
}
A. 15,10,20，# B. 10,20，# C. 10,20 D. 10