The children became Americanized much faster than their parents. Often this caused painful conflicts in immigrant families. A gap appeared between the children and their parents. The parents clung to Old World customs and beliefs. The kids spoke English all day with their friends. They thought in American terms. More than anything else, they wanted to be accepted as equals in their adopted land. Which other detail best supports the idea that children became comfortable in America more quickly than their parents?

When they left school, they looked, talked, and acted just like other American kids.
During hard times, kids had to drop out of school early. In the days before World War I, it was an accomplishment to finish grammar school.
Many kids went directly from grammar school to special vocational schools sponsored by private agencies. . . .
Students were also instructed in the fundamentals of health, hygiene, and personal grooming.
a book on the history of parks
a magazine about national parks