As the rejection letter pointed to, use correct paper size for the perm cert and timely resubmit Perm. It appears if that is all, you are on the...

I recommend consulting an immigration attorney for your 2 questions. Expediating pending 1-131 and bringing parent to the US for medical treatment.

Renouncing US citizenship is a significant decision. If overseas consult the US embassy. In the US I recommend you consult an attorney for counsel...

The answer to the question asked should have been "No". If you don't understand any question, don't don't be afraid to ask the officials to repeat...

Yes, every application requires a separate biometrics.

Yes, contacting your congressional offices would be another option.

Contact the Field Office that scheduled your oath. I don't see problems with rescheduling. Best regards!

I agree with the above attorney's counsel.

Unless otherwise specified, 1 or 2 entries followed by dates would be fine. At the I-485 interview, there is going to be an opportunity for further...

Without more, I fail to see any travel restrictions base on the facts you presented.