Question

marina is writing a paragraph about the union pacific railroad. read her paragraph and answer the question that follows.
the union pacific railroad was an innovation that revolutionized transportation in the united states. it was a tremendous accomplishment that required the labor and dedication of many individuals who worked tirelessly to lay the tracks and build the infrastructure necessary for such a massive undertaking.
marinas intended central idea is that the construction of the union pacific railroad was a monumental feat that involved a great deal of collaboration and hard work. how could marina have better developed her central idea?
by describing the types of good the railroad transported across the country
by explaining the materials that are used in the construction of a railroad
by listing all of the states that the railroad travels throu
by providing details about the challenges the workers faced during construction

Explanation:

The central idea is about hard - work and collaboration. Details on workers' challenges would show the hard - work aspect and how they collaborated to overcome them.

Answer:

D. By providing details about the challenges the workers faced during construction