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Correct answer: B. Who holds the plan — a session, a lead, or the script itself
Explanation
The principle — the surfaces are not sizes of one thing. They differ in where the plan lives.
Why the key is correct — each description answers it. Delegated workers do a side task in their own context and return a summary, so the session keeps the plan. A team's lead coordinates the work and synthesises the results. And a workflow moves the plan into code. Three holders, one question.
Why the others are wrong — worker count follows from the arrangement rather than distinguishing them. Capability is not on offer either: in every approach the workers are Claude sessions. And a script and a team differ in kind — one has the plan written down, the other a lead deciding as it goes.
Remember this — ask who holds the plan; the answer names the surface.
Sources — Anthropic's Claude Code agents, agent teams and workflows documentation.
Sources
“Delegated workers inside one session that do a side task in their own context and return a summary”
“One session acts as the team lead, coordinating work, assigning tasks, and synthesizing results.”
“A workflow moves the plan into code.”
“In every approach the workers are Claude sessions.”
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