运行下列语句，输出的结果是？（ ）
>>> x=["A","B","C"]
>>> y=["a","b","c"]
>>> {i:j for i,j in zip(x,y)}
{['A', 'a'], ['B','b'],[ 'C', 'c']}
{ 'a', 'b', 'c'}
{'A': 'a', 'B': 'b', 'C': 'c'}
{'A', 'B', 'C'}
