They are categorized by Confidential Documents.
If this is correct pls mark as Brainliest.
D ) grass , mushroom , wolf and deer
Teenagers in school or school related activities have shown bullying is the most common type of relational and interpersonal brutality.
I would choose answer 2, since that answer is based on a same size consisting of more than 1 person, making it applicable to statistic analysis and have an input in the observational study. The other questions ask for one data point, which isn't statistical
Source: AP Statistics