Answer:
c. the test is inconclusive
Explanation:
In statistic, Durbin-Watson statistic test is used for testing the auto correlation present in residual and regression analysis. Auto correlation means it works as lagged correlation between variable's current value and variable's past value. For a given significance level, if the calculated value of the Durbin Watson statistic lies between the lower critical value and the upper critical value the test is inconclusive.