Which statements are correct about the correlation of data plotted on a scatterplot?

I. The order of variables in a correlation is important.
II. Correlations provide evidence of association, not causation.
III. The correlation coefficent (r) has no units and does not change when the units of x and/or y are changed.

A)
I and II only

B)
I and III only

C)
II and III only

D)
I, II, and III