D. research towards preventing and curing disease.
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During 1803, Napoleon Bonaparte, who was the French ruler at that time, controlled the Louisiana Territory. President Jefferson believed that the French leader may be a threat to American trade and travel, so he decided to negotiate the Louisiana purchase. By doing so, the US would be able to use the Mississippi River and the Port of New Orleans more freely; both ports had been used by farmers to ship their crops and get paid. Jefferson was able to buy the Louisiana territory from France, since Napoleon Bonaparte needed money for the Great French War. As a result, with the purchase of this new territory, the land area of America nearly doubled.
Answer:
the phenomenon in which a person with expertise or status in one area is given deference in all areas
Explanation:
Halo effect is a cognitive bias in which overall impression of any person is formed based on perception of any one attribute of the person.
It is the tendency of evaluating someone based on relating correlating one attribute to another.
Example can be when one is well dressed and posses calm demeanor. It is often seen that people judge him as well educated and with moral values. Thus well dressed mannerism has caused judgmental biasing that he is well educated as well.
Option A says that a person with expertise or status in one area is respected in other areas thus his expertise in specific area is causing halo effect to earn him deference in other areas as well. Thus Option A is correct answer.
