When driving in Luanda or other Angolan urban centres around informal public transport minibuses (candongueiros / táxis azuis e brancos), what defensive driving precaution must a candidate take?

1. Anticipate sudden stops without warning to pick up passengers, maintain extended following distance, and scan for passengers stepping directly into the roadway
2. Tailgate closely to prevent the minibus from changing lanes
3. Overtake the minibus on the right shoulder while it is unloading passengers
4. Sound the horn continuously and accelerate alongside the minibus