The adult ABAS form applies to ages:

• A. 16-89
• B. 12-65
• C. 18-75
• D. 16-89

Answer: (D)

The main idea here is knowing which ages the adult form of the ABAS is designed to assess. The adult version is built for people who are no longer children and covers the span from late adolescence into older adulthood, using norms appropriate for adults. It specifically applies to ages 16 through 89, so it includes older teens who function in adult contexts and extends through older adulthood.

This is the best choice because it matches how the ABAS is structured: separate forms for younger children and a dedicated adult form that uses adult norms and targets everyday adaptive functioning across settings like work, independent living, and social life. Other ranges don’t fit because they either begin too early to reflect adult contexts or end too soon, excluding older adults who can still need assessment of adaptive behavior.