Spend ten romantic days enjoying the lush countryside of southern England. The counties of Devon, Dorset, Hampshire, and Essex invite you to enjoy their castles and coastline, their charming bed and breakfast inns, their museums and their cathedrals. Spend lazy days watching the clouds drift by or spend active days hiking the glorious hills. These fields were home to Thomas Hardy, and the ports launched ships that shaped world history. Bed and breakfasts abound, ranging from quiet farmhouses to lofty castles. Our tour begins August 15. Enrollment is limited, so please call soon. Which of the following counties is not included in the tour? A. Devon
B. Cornwall
C. Essex
D. Hampshire

The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.