Because of the unchanging nature of some risk factors such as gender or family history of a disorder, they are referred to as

According to Lewin, an adolescent may be called a "marginal man" because:

A) his or her life space is far too differentiated. B) the child portion of his or her life space overlaps with the adult portion. C) the margins of his or her cognitive structure are too thick. D) the margins of his or her cognitive structure are too thin.

Which of the following statements about sibling relationships is TRUE?

A) Sibling conflict usually increases as siblings enter late adolescence. B) Girls tend to remain closer to their siblings than do boys. C) Siblings spend more time together during adolescence than during childhood. D) all of the above