question: Q:You are conducting a systematic review on the effect of a new sulfonylurea for the treatment of type II diabetes. For your systematic review you would like to include 95% confidence intervals for the mean of blood glucose levels in the treatment groups. What further information is necessary to abstract from each of the original papers in order to calculate a 95% confidence interval for each study?? 
  {'A': 'Power, standard deviation, mean', 'B': 'Power, mean, sample size', 'C': 'Power, standard deviation, sample size', 'D': 'Standard deviation, mean, sample size', 'E': 'Standard deviation, mean, sample size, power'},