According to the following picture, what caused the poor field of vision?

1. A disruption in the field of vision can only be a result of blinding by another vehicle driving in the opposite direction.
2. The disruption is caused because the distance between the two vehicles is too small.
3. Correct answer: The fog caused the poor field of vision.
4. The disruption shown in the picture is inevitable, regardless of its cause.

WhyIn the picture visibility is reduced by fog. The distance or the oncoming headlights have nothing to do with it.