Why did european countries etsablish colonies in africa durine 19h century

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

What is the county seat of ward county nd?

Initially what happened to marigold litton after each test session