【单选题】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

答案: B