Which of the following developmental outcomes would be illustrative of the concept of vulnerability?

A) Very low IQ scores are more common among children who were born with a low birth weight and who are reared in highly stressed, uninvolved families.
B) Normal birth weight infants born into upper socioeconomic status families invariably have superior levels of intelligence.
C) Children born into caring, facilitative families rarely have sufficient protective factors to overcome or offset all vulnerabilities that might potentially affect their development.
D) Positive developmental outcome is possible only for children with few vulnerabilities and many protective factors.

A