According to the Authors, When Critically Analyzing a Study, It

According to the authors, when critically analyzing a study, it is important to evaluate the sample of the study to determine:

A) if the sample adequately represents the population from which it is drawn
B) if a stratified random sample was employed and, if not, why not
C) whether the sample used in this study has been used in any other related studies
D) whether different results could have been reached if a smaller sample was used