URGENT Choose the true statement(s):

I. r^2 represents the proportion of variation in the y-variable that is explained by the x-variable.

II. A correlation coefficient of −0.9 indicates a weak negative association between x and y.

III. A correlation coefficient of 0.5 means that 50% of the variation in the y-values is explained by the x-values.

IV. When r = 1, there is a perfect cause-and-effect relationship between the x-variable and the y-variable.

A) I only
B) I and II only
C) I, III, and IV only
D) III and IV only