What "prospective evils" is Taliaferro referring to? Check all that apply.
Lincoln might bring an end to slavery and injure the
economy
O The federal government might interfere more in
state issues.
Lincoln might persecute Southern leaders who
oppose him.
Southerners' voices might not be heard by the
federal government.
O Federal tariffs will likely be eliminated.
Politicians from the South might be replaced by
Northern politicians.

Newspaper started by john campbell:

Public opinion is of most value when the people who hold an opinion that opinion.

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.