Q: Fact 1: Sunlight and rain can cause a rainbow. Fact 2: Rain water contains small particulates and acid. Given the two facts above, sunlight and water containing small particulates and acid can cause what?

Options:
1). flooding
2). symptoms
3). rainbow
4). erosion
5). Pollution
6). toxins
7). imbalanced
8). disease
The answer is:
3).