How did the roman empire support its expansion and intergrate culture on three continents?

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

Why do you think kush in nubia is not as well-known as egypt? ( me with my exit ticket)

How does sociology account for the cause of drug and alcohol addiction?