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

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