运行下列代码， 正确的结果是? ( )
st = ['zhangsan','lisi','wangwu','zhaoliu','zhouba']
ans = st[0]
n = len(st[0])
for i in st:
if len(i)> n:
n = len(i)
ans = i
print(ans)
zhangsan
lisi
zhaoliu
zhouba