In Family Work, What Does the "Identified Patient" Phenomenon Refer

In family work, what does the "identified patient" phenomenon refer to?

A) A situation wherein one family member has a problem that affects the whole family system.
B) A situation wherein every family member claims to have a mental disorder.
C) A situation wherein one family member must receive individual treatment in order to resolve the problems of the family as a whole.
D) A situation wherein the whole family claims that one member is the cause of all family problems.
E) The term "identified patient" does not apply to family work.