Answer:
An experiment
Explanation:
The investigation in which a hypothesis is scientifically tested is called hypothesis. In the experiment cause (Independent Variable) and the effect ( dependent variable) is measured and extraneous variables are controlled. The opinions and views of the researcher should not have any effect on the results of a study, it made the data less biased and more valid.
In sum, Stowe's Uncle Tom's Cabin widened the chasm between the North and the South, greatly strengthened Northern abolitionism, and weakened British sympathy for the Southern cause. The most influential novel ever written by an American, it was one of the contributing causes of the Civil War.
Answer: Op-Ed : aims to persuade, expresses opinion, uses loaded language
News Article : aims to inform, uses neutral language, reports facts
Explanation: