Final answer:
b. The 1917 Immigration Act implemented literacy tests, quotas, and restrictions on immigration from certain countries, with the aim of limiting immigration and preserving American homogeneity.
Step-by-step explanation:
b. The 1917 Immigration Act, also known as the Literacy Act or the Emergency Quota Act, implemented literacy tests, established new quotas, and restricted immigration from certain countries.
The act aimed to limit immigration primarily from Southern and Eastern Europe, with the goal of preserving American homogeneity. It set annual constraints on the number of immigrants entering the country and imposed quotas based on nationality.