What type of immigrant policy did the U. S. have until the 1880's? A: Strict number policy
B: Whites only policy
C: Open shore policy
D: Political refugees policy

so it will be c

Explanation:

mericans encouraged relatively free and open immigration during the 18th and early 19th centuries, and rarely questioned that policy until the late 1800s. After certain states passed immigration laws following the Civil War, the Supreme Court in 1875 declared regulation of immigration a federal responsibility. Thus, as the number of immigrants rose in the 1880s and economic conditions in some areas worsened, Congress b

the anasazi indians were real pioneers and created roads and irrigation systems for watering their crops. they were also great architects and the cliff dwellings are one of their biggest achievements.

explanation: