下面代码的输出结果是a=123456789b="*"print("{0:{2}>{1},}\n{0:{2}^{1},}\n{0:{2}<{1},}".format(a,20,b))
A. *********123,456,789****1233,456,789*****123,456,789*********
B. ****123,456,789**************123,456,789123,456,789*********
C. ****123,456,789*****123,456,789******************123,456,789
D. *********123,456,789123,456,789*************123,456,789*****