单项选择题

有以下程序:  main( )  { unsigned char a,b,c;   a=0x3; b=a|0x8; c=b < < 1;   printf("%d%d\n",b,c);  }  程序运行后的输出结果是

A.-11 12
B.-6-13
C.12 24
D.11 22