Write a two paragraph response . READ BELOW!

You are to construct a 1-2 paragraph response answering this question: 

How has US immigration policy changed throughout the 20th century to modern day?

***Explain how the policy has specifically changed (i.e. what criteria did an immigrant need to meet in order to enter/what purpose did US policy have in mind when developing laws).***

Use the assignments from this week to base your response. Do not simply give me a summary of different titles of the policy.