I recommend filing it ASAP with an explanation for the delay.

She will fall out of status if you do not marry her in 90 days. In addition, you will have to re-start her green card process from the scratch when...

I agree with my colleagues. Unfortunately there is not much you can do. However, if you can show that there is an emergency that affects the...

She can apply for tourist visa, however due to COVID it might be possible that she may not get an appointment with the US Consulate. If she is able...

Only US Citizen can petition their married sons and daughters. However, I recommend talking to an immigration attorney to see what your options are.

You will need separate petitions for them. Please keep in mind that due to Covid, all processes are delayed.

I agree with my colleagues. Look for I-864p guidelines. If you have any dependents, include those.

Talk to an local immigration attorney and see what options you may have to appeal this decision.

Try using the Tatkal services for emergency passports.

One of the conditions of student visa is showing non immigrant intent. Since you’ve already applied for an immigrant visa, it will likely get denied.