The topic that would need to be broadened is option B
Why would a research topic be broadened?
The research topic in B might be expanded, owing to a lack of relevant literature, feasibility issues, interdisciplinary connections, relevance and applicability, research objectives that need to be refined, grant requirements to be met, and data accessibility.
By taking this calculated risk, researchers can strengthen their theoretical base, get past real-world obstacles, and reach a larger audience—all of which add to the breadth and significance of their research findings.