The French Government has placed many restrictions upon the use of the English language within their borders. They argue that the inflow of English movies, music, and literature is responsible for the dilution of their rich culture.
Surveys conducted by a group of sociologists show that French children display more familiarity with the superheroes of Hollywood movies than with the heroes of their traditional folklore. The French Government can use this fact to prove the effect of within their country.

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.