What is the primary danger when driving over freshly fallen rain or drizzle on an asphalt road after a long dry period?

1. Water mixes with accumulated engine oil, grease, and dust on the road surface, creating an extremely slick film
2. Rainwater immediately dissolves asphalt tar, causing instant sinkholes
3. Tires expand in size, reducing braking power
4. Engine electronics short-circuit upon contact with drizzle