The correct answer is option B ("Denver gets an average of 57 inches of snow every year").
We refer to "logos" as a literary or argumentative device employed to persuade someone of a certain statement using logical reasoning. In the present case, the only example that utilizes an appeal to logos, would be option B, since it's stating a clear logical fact based on statistics. This type of data could very easily be used in an argument to strongly support a specific stance.
Hope this helps!