"Because" clause and tag questions.

[sitifan]

1. She was late because she missed the bus, wasn't she?
2. She was late because she missed the bus, didn't she?
3. Because she missed the bus, she was late, wasn't she?
4. Because she missed the bus, she was late, didn't she?
Which of the above sentences is acceptable to native speakers?

 

[5jj]

The first three are acceptable. The fourth is not.