Answer:
B. Ellis Island was an important step on the way to American citizenship. Not everyone made it through the examinations.
Explanation:
The option that best paraphrases the central idea of the given excerpt is option B.
The excerpt tells us about how immigrants had to pass through Ellis Island before being admitted to the United States. There, they had to pass exams in order to be accepted. Otherwise, they would be detained or sent back to Europe. The possibility of this happening made many immigrants anxious. Option B paraphrases this information best.
Option A is incorrect because Ellis Island isn't called Heartbreak Island because of medical issues people had there.
Option C states what Ellis Island was. It mentions the exams, but not their results, which is important.
Option D doesn't tell us what Ellis Island is, and immigrants who didn't pass examinations weren't sent to live there.
