Which Alternative Best Describes the Purpose of Meta-Analyses with Respect

Multiple Choice

Which alternative best describes the purpose of meta-analyses with respect to establishing the validity of research

A) Meta-analyses counteract experimenter bias, allowing researchers to protect the internal validity of a study.
B) Meta-analyses repeat existing research, allowing researchers to evaluate the internal validity of a study.
C) Meta-analyses summarize the results of existing studies, allowing researchers to evaluate the internal validity of a piece of research.
D) Meta-analyses summarize the results of existing studies, allowing researchers to evaluate the external validity of a piece of research.