以下C程序正确的运行结果是 。 main() { long y=-43456; printf ("y=%-8ld\n",y); printf ("y=%-08ld\n",y); printf ("y=%08ld\n",y); printf ("y=%+8ld\n",y); } A. y=□□-43456 y=-□□43456 y=-0043456 y=-43456 B. y=-43456 y=-43456 y=-0043456 y=+□-43456 C. y=-43456 y=-43456 y=-0043456 y=□□-43456 D. y=□□-43456 y=-0043456 y=00043456 y=+43456