What is the essence of the Oath of the Katipunan?

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.

It is c because it shows how the author is stating their own oppinion about the protagonist

Transcontinental railroad was the most effective way to travel.