Earlier quoted context omitted.
You are within your rights to say no but if you say no, almost certainly CBP will assume that you are hiding something and deny you admission.
[flagged]
https://www.cbsa-asfc.gc.ca/travel-voyage/edd-ean-eng.html
https://www.theguardian.com/world/2022/jan/18/returning-trav...
Progressive utopias indeed