Design a how-did-you-hear survey

Help me design a how-did-you-hear survey.
Inputs: business; channels; capture points.

1. Separate first awareness from decision influence.
2. write neutral, answerable questions.
3. define coding, multi-touch interpretation and behavioral cross-checks.

Deliver: The question, Answer options, Where and how to ask, Tally sheet, Reading the results.
Clarify critical gaps, separate facts from assumptions, and do not invent data, citations or completed actions.

My material: [fill in here]

Before you start

Provide business; channels; capture points.