1. 

Cloudy days tend to be more windy than sunny days.
Foggy days tend to be less windy than cloudy days.
Sunny days tend to be less windy than foggy days.
If the first two statements are true, the third statement is
A. true
B. false
C. uncertain

Answer: Option C

Explanation:

Cloudy days are the most windy, but there is not enough information to compare the wind on the foggy days with the wind on the sunny days.