Read this central idea found in Immigrant Kids. The inspection process at Ellis Island was frightening for new immigrants.

Which line from the text best supports this central idea?

Before they could be admitted to the United States, immigrants had to pass through Ellis Island.
The immigrants had numbered identity tags pinned to their clothing.
When a case aroused suspicion, the immigrant received a chalk mark on the right shoulder for further inspection: L for lameness, H for heart, X for mental defects, and so on.
They were allowed to sit and rest and try again.