How do trait psychologists use traits to describe personality?

An education expert is researching teaching methods and wishes to interview teachers from a particular school district. she randomly selects ten schools from the district and interviews all of the teachers at the selected schools. which type of sample did she use in this study? a)systematic sample b)probability sample c)stratified sample d)cluster sample

The extermination of an entire targeted population is called genocide

Which factor contributed to the rise of african empires such as ghana and mali?