单选题：执行下列代码后，变量list2的值将改变为哪个选项？

执行下列代码后，变量list2的值将改变为哪个选项？
```
list1 = [1, 2, 3]
list2 = []
for element in list1:
list2.append(element)
list1 = [4, 5, 6]
```

@[A](2)

A. ```
[1, 2, 3]
```
B. ```
[4, 5, 6]
```
C. ```
[1, 2, 3, 4, 5, 6]
```
D. 没有；该代码无效



A.```
[1, 2, 3]
```
B.```
[4, 5, 6]
```
C.```
[1, 2, 3, 4, 5, 6]
```
D.没有；该代码无效


答案：A