Fey measures wind speed every fifteen minutes for one hour in her back yard. Her data is recorded below.

Time Wind Speed (MPH)
8:00 AM 1.5
8:15 AM 1.8
8:30 AM 3.0
8:45 AM 12.2
9:00 AM 16.6

As Fey takes her last two measurements she notices that the temperature drops suddenly. Which of the following weather predictions would be best for Fey to make?
A.
A tsunami is approaching.
B.
A hail storm is approaching.
C.
The air's humidity is decreasing.
D.
A cold front is moving in.