A. One doctor drew chalk marks on immigrants with health problems
Explanation:
The excerpt is taken from Immigrant Kids and is written by Russell Freedman. In the excerpt, two doctors working for the United States Health Department examines the immigrants in the airport for any contagious diseases and health issues and also detain people for any mental problems also. In the excerpt, it is given that the doctors mark the immigrants with a chalk those who have some health problems and identify unfit to enter United States.
