The broad research approach that the psychologist should use to address the subject matter is the Experimental research because its draw conclusion from manipulvariables.
Experimental research is a type of research where the researcher actively influences the variables to observe and draw conclusion.
Experimental research are used to draw conclusions on a subject matter at hand.
Here, the broad research approach that the psychologist should use to address the subject matter is the Experimental research because its draw conclusion from numerous variables.
Therefore, the Option B is correct.
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