In ANCOVA, Suppose Y Is the Dependent Variable, X Is $\bar{X}_{1}$

Multiple Choice

In ANCOVA, suppose Y is the dependent variable, X is the covariate, and the factor has two levels. Also all assumptions of ANCOVA are met. Which of the following situations is the most desirable?

A) r_XY = 0.5; $\bar{X}_{1}$ =10, $\bar{X}_{2}$ =12, $\bar{X}$ =11.
B) r_XY = 0.1; $\bar{X}_{1}$ =10, $\bar{X}_{2}$ =12, $\bar{X}$ =11.
C) r_XY = -0.1; $\bar{X}_{1}$ =10, $\bar{X}_{2}$ =20, $\bar{X}$ =15.
D) r_XY = -0.5; $\bar{X}_{1}$ =10, $\bar{X}_{2}$ =20, $\bar{X}$ =15.