Answer: C. externalizing or internalizing.
In adolescent development, there are two types of problems. They are internalizing and externalizing problems. Internalizing problems are problems that primarily affect the internal world of a person. Examples of internalizing problems are anxiety, depression, eating disorders, etc. Externalizing problems on the other hand are problems that create difficulties in the external world of a person. These problems include fighting, risky driving, delinquency, and unprotected sex.