Help med

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 service name do you like? 1.schoolbrella 2.schoolplicity 3.studentaxle 4.studiley 5.edulliance 6.savantsnap 7.peaklemon 8.swiftgrasp 9.educaco 10.vistarise 11.iqpursuit 12.studentpivot 13.edgyadvice 14.studenterra

Which phrase correctly completes the statement? "the korean war " lasted 3 years. has never ended. was won by north korea. was won by south korea lasted 3 years. has never ended. was won by north korea. was won by south korea.