When rain first begins to fall, why is the road surface most dangerous during the first 15 to 30 minutes?

1. The tires are cold and cannot grip the asphalt
2. The water mixes with accumulated oil and grease on the road, creating an extremely slick emulsion
3. Heavy rain creates a thick mist that blocks all headlight beam projection
4. The road surface undergoes thermal contraction, cracking the pavement