What are the reasons for the refusal of a study visa in the United States?

Hello, I think there are roughly the following reasons;

Insufficient materials, not actually preparing materials according to the visa requirements.

Insufficient capital guarantee and insufficient property certificate.

There is a tendency to emigrate, and the interviewer thinks that the purpose of your study abroad is to emigrate.

These are more common. Of course, there will be other reasons.

Because interviews in the United States are very random and the difficulty of interviewing officials is different, the requirements may be different.