A coordinator delegates to a synthesis subagent but it ignores the earlier web-search findings. What's the most likely cause?

1. A.The subagent needs a larger context window
2. B.Subagents inherit coordinator history automatically, so this is a model bug
3. C.The findings weren't passed explicitly in the subagent's prompt — subagents don't inherit context
4. D.The coordinator should have used end_turn