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Correct answer: B. You upload material once and every chat in that project can use it
Explanation
The principle — the knowledge base removes the re-pasting that makes ongoing work tedious.
Why the key is correct — Anthropic describes uploading relevant documents, text, code or other files to a project's knowledge base. Because the workspace holds it, each new conversation inside that project starts with the material already available.
Why the others are wrong — it is not a backup, it is not shared with strangers, and nothing is flattened into a fixed set of prepared answers.
Remember this — upload once, ask many times. That is the whole benefit.
Sources — Anthropic's projects documentation.
Sources
“You can upload relevant documents, text, code, or other files to a project's knowledge base.”
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