Asked by phia
                Which is the best fertilizer for Mr. Jimenez’ backyard grass? Select the type of study most appropriate to the question.
A. Experimental
B. Experimental blinded
C. Case-controlled observational
D. Observational
My answer is C
            
        A. Experimental
B. Experimental blinded
C. Case-controlled observational
D. Observational
My answer is C
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