Fact 1: High pressure systems cause clear weather.

Fact 2: Weather Clear weather usually means good visibility.

Given the two facts above, answer the question "what does a high pressure system cause?" with the following options: 
- hyperthyroidism
 - lowered energy cost
 - harmful substances
 - Heart rate
 - good visibility
 - It gets heated up
 - Pollution
 - rainfall


 

     good visibility    