The student wants to provide an example of an air mass. Which choice most effectively uses relevant information from the notes to accomplish this goal?
A
Air masses are large bodies of air with generally uniform humidity and temperature.
B
The air mass classification system uses two-letter names and is based on the work of Tor Bergeron, a Swedish meteorologist.
C
Air masses are commonly classified by a two-letter name that indicates humidity and temperature.
D
One type of air mass is known as a cA, or continental arctic, air mass because it is dry and cold.
Explanation
Correct answer: D.
Choice D is the best answer. The sentence provides an example of an air mass: the cA, or continental arctic, air mass.
Why the other choices are wrong
Choice A
Choice A is incorrect. The sentence provides a general definition of air masses; it doesn’t provide an example of a specific air mass.
Choice B
Choice B is incorrect. The sentence describes the system used to classify air masses; it doesn’t provide an example of a specific air mass.
Choice C
Choice C is incorrect. The sentence explains how air masses are classified; it doesn’t provide an example of a specific air mass.