Scott was referred to a youth prevention program due to low grades and suspected substance misuse. What type of program is this?

The correct choice reflects the nature of the program as selective because it is aimed at a specific group of individuals who share common risk factors, in this case, low grades and suspected substance misuse. Selective programs are designed for individuals who are at increased risk for developing substance use problems due to specific characteristics or circumstances.

In Scott's situation, he has been identified as having vulnerabilities that may lead to substance misuse, which makes him a suitable candidate for a selective program. These programs focus on those who have not yet shown significant substance issues but are at risk based on their behaviors or environment.

Universal programs, on the other hand, target broad populations without considering individual risk factors, while indicated programs are typically offered to those who have already begun to show signs of substance issues or engage in risky behavior. Treatment programs specifically provide intervention for those already diagnosed or experiencing substance use disorders, which is not the case for Scott at this point. Thus, the designation of the program as selective is fitting due to its targeted approach for at-risk youth.