下面代码的执行结果是‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‪‫ a = 123456789b = "*"print("{0:{2}>{1},}{0:{2}^{1},}{0:{2}<{1},}".format(a,20,b))
选项：

A:****123,456,789*****123,456,789******************123,456,789;
B:*********123,456,789123,456,789*************123,456,789*****;
C:*********123,456,789****123,456,789*****123,456,789*********;
D:****123,456,789**************123,456,789123,456,789*********