Which of the Following About Meta-Analyses Is True

Multiple Choice

Which of the following about meta-analyses is true?

A) it can be replicated by scholars who might question the findings
B) it is a tally system that adds up how many studies measuring a certain outcome variable find positive versus negative effects
C) it provides insight into some studies but has a limit as to how many studies can be included in the analysis
D) it provides a way to reanalyze studies that have already been do to confirm that their results are accurate and true