回复：XiaoBaiTu or any experts are welcome answer my questions a

Try to answer:

1. Last one enough. But I remember when my wife apply it, I submitted both of them. One extra paper only....

2. Don't remeber it. But no information for the employment I think. I think, the RA and TA you got is different with it.

3. This $100 is for USCIS to monitor you, I think.