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.
Answer:
A
Explanation:
National Security Act of 1947.
Answer:
"He initially refrained from committing ground forces after being advised that North Koreans could be stopped solely by America's superior air and naval power."
Explanation:
