A complex task includes a bounded investigation of an unfamiliar module. In a supported agent workflow, why might delegating that investigation to a sub-agent help?

1. It eliminates the need to provide a question or success criteria for the investigation.
2. It grants access to repositories that the main user cannot read.
3. It guarantees the investigation cannot contain incorrect conclusions.
4. It can isolate exploratory context and return a focused result to the main task.