i believe the answer is a :)
Answer: It seeks to ensure that all persons are treated equally.
Explanation:
The first international document adopted in the 21st century is the International Convention on the Rights of Persons with Disabilities. A large number of politicians, people from the non-governmental sector and people with disabilities participated in the drafting of the convention.
The aim is to ensure that persons with disabilities have a healthy life and rights as equal elements of a community. The authors view this convention through the prism of equality as an elementary principle of a democratic society. They seek to squeeze out all the fragments of discrimination against persons with disabilities in modern society.
While the work was dangerous and difficult, many Americans were willing to leave behind the declining prospects of preindustrial agriculture in the hope of better wages in industrial labor. Furthermore, problems ranging from famine to religious persecution led a new wave of immigrants to arrive from central, eastern, and southern Europe, many of whom settled and found work near the cities where they first arrived. Immigrants sought solace and comfort among others who shared the same language and customs, and the nation’s cities became an invaluable economic and cultural resource.
source: https://courses.lumenlearning.com/suny-ushistory2os2xmaster/chapter/urbanization-and-its-challenges/