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

it's

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.