Read this excerpt from "The Sandia Mountains." The total length of the tram system extends nearly three miles. The span that extends from the second tower to the peak is the third longest clear span in the world. A clear span is a "length of cable between supporting towers." The cars travel at a speed of 12 miles per hour and provide passengers with an unimpeded view of the city of Albuquerque, the Rio Grande, and even three extinct volcanoes.

How do the first three sentences in the excerpt develop the idea that the Sandia Tramway is immense in size?

The term clear span is defined.

The reason for the tram's length is explained.

The Sandia Tramway's span is contrasted with other clear spans in the world.

A description of the second tower and the peak is provided.