How did the Persians improve communication throughout their empire? A. They used carrier pigeons to send messages.
B. They built roads and invented a postal service.
C. They had fast runners relay messages over long distances.
D. They made their subjects use only one common language.

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

Which of the following is true of cultural syndromes of distress? a. it refers to attributing pathological symptoms to normative cultural differences. b. refers to misinterpreting culturally sanctioned behavior as expressions of pathological symptoms. c. it refers to the ways that communities and cultural groups communicate and express their distressing thoughts, behaviors, and emotions. d. it refers to patterns of symptoms that tend to cluster together for individuals in specific cultural groups, communities, or contexts.

How did the spanish prove to be excellent allies in the war? give examples?