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))

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*********