The Purpose of Design Flaw Analysis Is to

The purpose of design flaw analysis is to

A) seek the advice of an expert who can check a literature review for design errors.
B) ensure that only studies that provided appropriate effect size information were included in the analysis.
C) provide evidence to the Institutional Review Board that the meta-analysis will be conducted in an ethical manner.
D) look for threats to internal validity that exist in all or most of the studies being reviewed.