Read the excerpt from Immigrant Kids, and then answer the question. Most immigrants passed through Ellis Island in about one day. Carrying all their worldly possessions, they left the examination hall and waited on the dock for the ferry that would take them to Manhattan, a mile away. Some of them still faced long journeys overland before they reached their final destination. Others would head directly for the teeming immigrant neighborhoods of New York City.

What best paraphrases the central idea of the excerpt?
Ellis Island was known as “Heartbreak Island” because so many had heart and medical problems while there.
Ellis Island was an important step on the way to American citizenship. Not everyone made it through the examinations.
In 1892, Ellis Island became the nation’s immigrant processing center. Lots of questions and exams were given there.
Immigrants who couldn’t pass examinations felt a lot of anxiety and were sent to live on Ellis Island.