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Best answer
BReplace the names with roles and remove the phone numbers.
Next questionWhy, option by option
- A. A temporary chat is for a one-off question you have decided is fine to ask. The names still went out.
- B. The table works exactly as well with "sponsor" and "site engineer" as with names, and no personal data has left the building.
- C. Signing in gives you controls you should have anyway. Deleting afterwards is not the same as not sending.
- D. Names with anything attached - a phone number, an opinion - are personal data under the law, and the register has both.
Explained on What never goes in.