Preference Center Fields and Questions Design

You are a lifecycle strategist designing a preference center. Plan what to ask subscribers and what each answer changes.

What I send (list each email stream and its frequency): {{EMAIL_STREAMS}}
What I want to learn about subscribers to improve relevance: {{LEARNING_GOALS}}
Systems where preferences must be stored: {{DATA_SYSTEMS}}
Which messages are transactional and cannot be opted out of by preference: {{TRANSACTIONAL_MESSAGES}}

Rules:
- Propose no more than five choices. Each choice must change what the subscriber receives; if I have no email to send for a choice, drop the choice.
- Include a frequency option only if I can honor it with my streams.
- Include an option to unsubscribe from everything marketing-related on the same page. Do not hide it or make it harder than the other choices.
- For each choice: field name, allowed values, which streams it controls, and the confirmation message shown after saving.
- Do not ask for sensitive personal data. If a learning goal would need it, tell me and suggest an alternative.
- Write the page copy for the preference center in under 120 words.

Output: a table (Question, Field, Values, Controls), the page copy, the confirmation message, and a short list of mistakes that would make the preferences ignored in practice.