Which of the Following Correlations Represents the Weakest Degree of Relation

Multiple Choice

Which of the following correlations represents the weakest degree of relation between two variables?

A) Daily calcium intake and bone mass density, correlation coefficient = +.11
B) Degree of exposure to lead and IQ scores in children, correlation coefficient = -.12
C) Hours of exposure to media violence and aggressive behavior, correlation coefficient = +.31
D) Number of cigarettes smoked per day and incidence of lung cancer, correlation coefficient = +.39