If a teacher tells a student that those who attend the study session typically score higher on the final exam
A. the student has a negative incentive to attend the study session because she will be punished if she does not go.
B. the student has a positive incentive to attend the study session because she may get a higher grade.
C. a "C" student will be making an irrational decision if she decides to skip the study session since she has plenty of time to go.
D. the student has no greater incentive to attend because there is no guarantee she will get a higher grade on the exam.
Answer: B
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What best describes changes in per capita output between 1860-1880?
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Refer to the information provided in Figure 8.4 below to answer the question(s) that follow. 
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A. Housing subsidies B. Unemployment benefits C. Food stamps D. Social security payments