Answer:An intervening variable
Explanation:
An intervening variable is a hypothetical variable which explains the relation or casual association that occurs between other variables. Intervening variables is non observable one can not observe it during an experiment which is the reason it is referred to as hypothetical. Intervening variables in this case above explains how healthy lifestyle contributes to two variables which are church involvement and life expectancy.
After the surprising finding, the researcher decides to conduct the same study in her lab which is an example of experimental research.
Experimental research is research that involves two sets of variables. One of the sets of the variable is constant which is further used to determine the difference with the second set of variables.
Experimental research is based on a scientific research design that tests a hypothesis by experimentation. It uses one or more independent variables on one or more dependent variables.
Experimental research is conducted over time in a controlled environment. In the question, the researcher is conducting the research in her lab which is a controlled environment. It is also given in the question that the study she has heard about was conducted in a month.
Therefore, the researcher will replicate the same study through experimental research.
Learn more about experimental research here brainly.com/question/17009178
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Answer:
Is A because that was the main goal oficial US official keeping communism to stop spreading beyond the countries already under its influence.
