Which of the Following Statements About Autocorrelation Are True

Multiple Choice

Which of the following statements about autocorrelation are true?
I. Successive residuals are often correlated in time series because an event in one time period often influences the event in the next period.
II. If residuals are correlated,we can use r as the coefficient of correlation and conduct the common tests of hypothesis about regression coefficients.
III. A Durbin-Watson statistic d is used,instead of directly conducting a hypothesis test on r.

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