What mode of transportation transported troops and supplies for the north?

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

How did the aztec culture benefit spain when they were conquering the aztecs?

Which type of fungus is shown in the diagram