Reviewers find that about a third of research reports have thinly supported sections, even though the synthesis subagent itself writes "limited evidence found" in those sections. The coordinator sends the first synthesis output straight to the report subagent. What is the best improvement?

Answer: D — Have the coordinator check synthesis for gaps, send targeted queries for them, and re-run synthesis

This calls for an iterative refinement loop: the coordinator evaluates synthesis for gaps, re-delegates targeted queries to search and analysis, and re-invokes synthesis until coverage is sufficient. Omitting sections (a) or softening wording (c) hides the gap instead of closing it, and rerunning the original queries (b) mostly retrieves the same material.