下面Python代码执行后，第4行输出是( )。
lstA =[1,2]
lstB,lstC =[lstA,lstA*3]
lstA[1] =100
print(lstA,lstB,lstC)
[1, 2] [1, 2] [1, 2, 1, 2, 1, 2]
[1, 100] [1, 100] [1, 100, 1, 100, 1, 100]
[1, 100] [1, 2] [1, 2, 1, 2, 1, 2]
[1, 100] [1, 100] [1, 2, 1, 2, 1, 2]