Which of the Following Describes the Effect of an Increase

Multiple Choice

Which of the following describes the effect of an increase in the variance of the difference scores?

A) Measures of effect size and the likelihood of rejecting the null hypothesis both decrease.
B) Measure of effect size increase,but the likelihood of rejecting the null hypothesis decreases.
C) There is little or no effect on measures of effect size,but the likelihood of rejecting the null hypothesis increases.
D) There is little or no effect on measures of effect size,but the likelihood of rejecting the null hypothesis decreases.