Answer:
At that time, Stephen Douglas generally support the expansion of slavery. Lincoln initially argue that if they allow the expansion of slavery to happen, it would eventually spread into the free states and revert the progress that the republican party tried to achieve.
Douglas accused Lincoln of wanting to override/overthrow the states authority that excluded black citizens in order to gain more voters to his party in the upcoming election,
Interest is what it is called
Answer:
This is an example of an experimental design.
Explanation:
Experimental design in research involves controlling the variables in order to prove the hypothesis. In an experimental design there must be an experimental group, that in this case is the group that received an herbal supplement, and a control group, that was only administered placebo. By having a control group, both groups can be measured and compared at the end of the experimental phase, to measure the influence of the independent variable.