US Immigration from Canada

Hi there - I guess I may ask a dumb question but I would rather hear so than do something wrong. I am prepping for ROC and I will Fedex my application. That means I will send it to the office in Phoenix. I would prefer to use credit card to pay the fee so I just wanna double check if I can do that? The Phoenix office can process credit card right? Do you guys recommend me to pay with credit card or check? Thanks!

Does anyone know whatever happen to Pres Biden saying people who are waiting to join their families would be allowed to wait in the states? Did that promise materialize, Any news on that?

thanks

Hoping someone who has experienced this can give some insight. My husband and I are going in 3 weeks for my AOS interview and we don't have anyone to leave my 13 month old with, is it a problem to bring him along? We're going to the Seattle office.

Thanks!

Wondering if anyone has gone through the Naturalization process (through marriage) where they already hold two passports and as such, the U.S. passport would be their third passport. Is that ok? Does it cause more issues?

My fiance and I have decided after him staying here for 3 months that we are going to have him stay and file for AOS instead of pursuing the K1 route. He has a car he owns free and clear in Canada. I know of the paperwork required to have someone bring the vehicle across the border but what are all of our options for doing so and will any of them cause issues.

Option 1: I fly to Canada and drive the car back provided the border opens.

Option 2: His friend drives his car down when he comes for the wedding.

Option 3: Hire a company to ship the car.

What is the best option that won't cause any hiccups or red flags? Thanks in advance.