In Which of the Following Situations Will the Adjusted Means

Multiple Choice

In which of the following situations will the adjusted means always equal the unadjusted means in ANCOVA?

A) All groups have the same unadjusted mean.
B) All groups have the same mean on the covariate.
C) The dependent variable and covariate are highly correlated.
D) Regression of the dependent variable on the covariate with b_w = 0.6.