I show them my US passport when I cross and then they automatically know that me and my kids are also Canadians... everything is linked (a border agent once tol

I show them my US passport when I cross and then they automatically know that me and my kids are also Canadians... everything is linked (a border agent once told me because he thought that I didn't know because they were all born in the US (first generation born in the US is automatically Canadian too)). They ask you so much information when you fill out ArriveCan that it isn't hard to figure out that you have it when you show them your passport.