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Which of the following statements is/are true regarding transforming a model involving an explanatory and response relationship?

I. One should consider transforming the data if the residual plot of residuals on $X$ fails to show a pattern.

II. One should consider transforming the data if the scatterplot of $X$ against $Y$ shows a curved pattern.

III. One should consider transforming the data if the correlation coefficient, $r$, is $-0.30$.

A

I only.

B

II only.

C

III only.

D

I and II only.

E

I, II, and III.

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