Which best explains why immigration laws were passed in the 1920's?
A
Industrialization reduced the demand for immigrant labor.
B.
Many nativist groups opposed continued immigration.
C
Labor unions favored unlimited immigration,
D.
Urbanization was on the decline.

Option B, Many nativist groups opposed continued immigration, is the right answer.

Explanation:

In the decade of 1920's, the restrictions on immigration increased. The government of the United States enacted the Immigration Act in the year 1924 to put restrictions on immigration. This act was the most severe of all the acts made to control immigration because it limited the overall number of immigrants and introduced quotas based on the nationality of immigrants.

The introduction of this act resulted in a sharp reduction in the number of immigrants coming from Eastern Europe and Africa and it completely restricted the immigration of Asians except for Japan and the Philippines. The government of the United States passed these immigration laws because many native groups opposed the continued migration in America.

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

b.

jim crow laws were enacted in northern states.