Hopefully you did not sign any statement under pressure. You can make a new application and apply for a visa, however best to consult with an...

You are not out of luck, but the Department considers all previous marriages especially to USC spouses

COS to B-2 can be sought for additional time to wrap up affairs. Usually not recommended as H-1B is to be approved to start working.

COS to F-1 can be filed if maintaining status. Wife's COS is to be filed along with your application for F-2.

Underlying international manager green card category will be affected? Will that nullify his green card eligibility in EB1(c)? Best to seek...

Laid off 1 month after filing I-485. Can I file I485J later? Best to look for work in same or similar classification and seek AC21 benefits

If I 140 is approved outside the country can I apply for 1 yr or 3yr h1b extension ? With approved I-140, 3-year extension can be sought.

Can a organization apply for my h1b and i140 at the same time? Yes, both petitions can be filed simultaneously.

You will need a job offer to adjust status so if you believe your employer is likely to withdraw their I-140, you can opt for portability.

Can my mom stay in USA on visitor visa for more than 6 months through I-539? If you have definitive travel plans, the B-2 status can be extended.