Answer: D, OPEN SHORE POLICY
Step-by-step explanation:
This literally came from my textbook for class:
In the early days of the country, communities struggled to survive, and desperately needed more people. There were no real rules about who could come to America, and immigrants of all kinds were welcomed. Until the 1880s, there was an “open shore” policy which allowed nearly unlimited immigration, barring only people with certain diseases or criminal records.