Imposition of quota laws.
It allowed them to settle down and not live always on the move as Nomadic tribes. They became established farming colonies.
Answer: A. Navajo Indians in the U.S. Marine Corps developed an unbreakable code using their native language.
Navajo is a language that is not written and is very complex with its incomprehensible syntax, tonal qualities and especially the dialects. That is the main reason that Navajo language was used to secure communications during the war.
