How would you get the attention of the overtaken vehicle’s driver while overtaking on a freeway (motorway)?

1. A Use the horn for as long as you are passing him. It is important that he doesn't ignore you.
2. B You are permitted, if it is necessary, to use the horn briefly before passing, .
3. C During day light, turn on the vehicle’s parking lights.
4. D If required, signal to him with the vehicle’s four direction indicators.