Final answer:
Meta-analysis assumes conceptually similar studies share a common methodology, allowing for the aggregation and comparison of their results.
Step-by-step explanation:
The meta-analysis technique assumes a B) Shared methodology behind conceptually similar studies. Meta-analysis is a statistical approach that combines the results of multiple studies to integrate findings and draw more robust conclusions than can be provided by any single study. This technique relies on the premise that the studies being analyzed share a common methodology, which allows their results to be compared and aggregated.