What most likely is the author suggesting through the figurative language in the passage? The furniture is alive. The classroom is very clean. Mrs. Garcia scares the room. Mrs. Garcia is a good teacher.

American railroads were created to serve regions limited to the municipalities and their contours. Thus, the technical aspects were chosen in each state according to the preference of the engineers.

As the country's development progressed, markets expanded and locomotives had to move beyond their limits. Thus, a standard was agreed and all tracks were standardized.

Thus, trains of different railway lines could use the lanes of each other, according to item C of the question.