Application Type: I485, APPLICATION TO REGISTER PERMANENT RESIDENCE OR TO ADJUST STATUS

Current Status: Request for Additional Evidence Sent

On July 24, 2009, we mailed a notice requesting additional evidence or information in this case I485 APPLICATION TO REGISTER PERMANENT RESIDENCE OR TO ADJUST STATUS. Please follow the instructions on the notice to submit the requested information. This case will be in suspense until we receive the evidence or the opportunity to submit it expires. Once we receive the requested evidence or information and make a decision on the case, you will be notified by mail. If you move while this case is pending, call 1-800-375-5283 to update your address.

지금 이런 메일을 받았는데요.추가서류 요청같은데 대체로 어떤걸 물어보는지? 그리고 이런거 받으면 리젝될 확률이 얼마나 되는지 궁금합니다.
아시는 분 답변꼭좀 부탁드립니다.