How should a driver conduct himself when another vehicle suddenly emerges in his driving lane from the opposite direction, heading towards him?

1. A Swerve to the left and drive on the opposite lane, which is currently free.
2. B Honk and signal the other driver to get back to his lane.
3. C Slow down, pull as far right as possible and even pull onto the “hard shoulder” if necessary.
4. D Turn on his high beam and signal the other driver to get back to his lane.