Answer:
The reason why more people from southern Europe were allowed to enter the United States was because they probably had a lot of good resources like gold, iron and pollution.
Step-by-step explanation:
So the text your reading about is basically about immigration on birth countries, which means that very few people could come to the United States of America, Those laws were more restrictricous on people who lived in eastern and southern Europe, But to the people who lived on the north or west side of Europe those rules did not apply to them, The north and west side had a lot of resources.