Answer :
The reason why people associate substance abuse with externalizing disorders is because substance abuse is an externalizing disorder.
What is the relationship between substance abuse and externalizing disorders?
Research has shown that there is a positive correlation between substance abuse in teens and externalizing disorder displayed by those teens in childhood.
For this reason, it is commonly said that teens with substance abuse issues have externalizing disorders.
Find out more on externalizing disorders at https://brainly.com/question/7001259.