Which of the Following Is Not a Possible Indicator of Multicollinearity

Multiple Choice

Which of the following is not a possible indicator of multicollinearity?

A) signs opposite from what is expected in the estimated $\beta$ parameters
B) non-significant $t$ -tests for individual $\beta$ parameters when the $F$ -test for overall model adequacy is significant
C) significant correlations between pairs of independent variables
D) non-random patterns in the plot of the residuals versus the fitted values