Q: Fact 1: High pressure systems cause clear weather. Fact 2: Also known as an cyclone , it is the opposite of an area of high pressure , or a anticyclone. Given the two facts above, anticyclones cause what?

Pick from: [I] global warming [II] colder weather [III] Greenhouse gases [IV] clear weather [V] Dehydration [VI] erosion [VII] flooding [VIII] contamination
The answer is:
[IV]