Answer:
The excerpt which shows that Douglass argues for equal rights for people of all races and national origins is:
"There are such things in the world as human rights. They rest upon no conventional foundation, but are external, universal and indestructive. Among these is the right of locomotion; the right of migration, the right which belongs to no particular race, but belongs alike to all...We shall mold them all... into Americans; Indian and Celt, Negro and Saxon, Latin and Teuton, Mongolian and Causacian, Jew and Gentile, all shall here bow to the same law, speak the same language, support the same goverment, enjoy the same liberty."
Step-by-step explanation:
The above selection reveals that Douglass argues for equal rights for people of all races and national origins.
He believes that everyone should enjoy the benefits of liberty no matter your race or colour. He advocates for equal rights for all people.