Answer:
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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.
Article 9 gives Congress the power over most aspects of foreign policy. It gives it the sole right to declare war. It gives Congress the sole right to send ambassadors to other countries and to make treaties with other countries. brainliest please