Researchers Have Suggested That Adolescence as a Social Category Was

Researchers have suggested that adolescence as a social category was invented
Between 1890 and 1920, a time in which

A) parents became reluctant to see their children grow up.
B) young people began to rely more on their parents for economic survival.
C) educational opportunities began to open up for them.
D) the onset of puberty was first specified.
E) they became separated from the adult world of which they had until then been a part.