Answer:
A. a replication of studies
Explanation:
A researcher performs a previous study following the same procedures to see if she will get the same results.This is an example of a replication of studies.
Carrying out a previous research under the same exact conditions to see if the results will be the same is simply a replication of study. Replication of studies is necessary for the validation of results gotten from the previous research.
<em>D.All government officials.
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<em>HOPE IT HELPS!! SMILE!!</em>
Dan's experience demonstrates as the flying phobia or aerophobia it is classified as the fear of being on an airplane. After he hears the news about an airplane crash he experiences the anticipatory anxiety of being out of control and swamp that can prevent a person from planning to travel in air. The manifestation of this phobia can include panic attacks or vomiting. He fears to crash psychologically.