The correct answer is the Civil Rights Act of 1964.
Promotion could have multiple meanings.
For example, if you say "Mr. Knight got promoted (or got a promotion) from supervisor to manager". There promotion means "raise".
If a product is at promotion there promotion means advertising efforts.
It could also refer to a way to support a cause. For example: There's a campaing supporting healthy lifestyle promotion.
Answer:
B. Unrestricted
Explanation:
The 1800s immigration policy was unrestricted because Americans encouraged relatively free and open immigration.
