Which statements below about the least square regression are correct?
I. Switching the explanatory and response variables will not change the least square regression line
II. The slope of the line is very sensitive to outliers with large residuals
III. A value of r^2 close to 1 does not guarantee that the relationship between the variables is linear
(a) Only I
(b) Only II
(c) Only III
(d) Both II and III
(e) I, II, and III
Answer: C