题目内容：
According to the passage, it is true that ________.
in the late 19th century in the United States the dividing line between adolescence and adulthood no longer existed
no one can marry without the permission of his parents until the age of twenty-one
one is considered to have reached adulthood when he has a driver’s license
one is not free from the restrictions of child labor laws until he can join the arm
参考答案：