For Greece Category B car theory, which statement about risk stacking is correct?

1. Risk stacking occurs when several smaller risks, such as rain, darkness, fatigue, and traffic, combine into higher danger.
2. The safest answer about risk stacking is to ignore the usual priority rule.
3. The correct response for risk stacking is mainly to use the horn and continue.
4. This topic concerns only vehicle comfort and has no safety or legal effect.