15. What is one difference between a case study and a survey? A case study involves one person; a survey usually involves many people.
A case study involves one question; a survey usually involves many questions.
A case study is conducted on paper; a survey is usually face-to-face.
A case study's results can be generalized for other people; a survey's results cannot.

What was one important characteristic of the russian military during world war i? a. it had more advanced military technology than its western european allies. b. it was an all-volunteer military that enjoyed high morale throughout the war. c. it defended russian territory but refused to attack german positions d. it was unable to provide its forces with adequate weapons and supplies.