A researcher uses five effect sizes from previous studies similar to the one the researcher wants to conduct to identify an a prior effect size to use in an a prior power analysis.The research calculated an average effect size of the five similar studies and all five studies used different sample sizes.Which one of the following description best reflects what the researcher used in the calculation of the five studies' effect sizes with different sample sizes?

A- An average effect size representing a combined mean using normality estimates.

B- An average a priori effect size weighted by sample sizes.

C- An average a priori effect size confirmed with normality estimates.

D- An average a priori effect size calibrated from a prior power.