This is my opinion, may be I am wrong...........
If you go do CP and get rejected I think there is 100% chance that you will not get F1 visa again, so you will not be able to come back and finish your studies. I do no know what happens if you still have a valid F1 stamp.
If you do AOS and get rejected you will be able to continue your studies on F1.
I have been researching a lot about F1 and AOS and I am getting very conflicting information. Most of the people say that a person loosed F1 because submission of I-485 is showing your immigration intent, and F1 is not a dual intent status. But I got some other information and documents that say that it is not like that. That the person can continue studies on F1 even if AOS is rejected. I contacted my lawyer and he promised me to find it out for sure and get back to me in couple of days.
This is my posting from some other discussion board:
Some of the lawyers in this discussion board previously wrote that F1 and AOS application is "gray area". As you can see yourself from the my posting bellow even USCIS themselves do not know how to proceed in these cases.
I wrote it in my previous email.
Director of my ISS office showed me a document from the Department of Homeland Security where They advise that a student should maintain its F1, while Adjustment of Status is pending, so in case it gets denied, student would be able to continue studies on F1.
It said:
"What should be done with the records of students with a change of nonimigrant status (COS) pending, and thus valid status while the application is pending, but who will not be registered for the next term? The termination reasons do not include a selection for COS pending. NAFSA also asked what to do with SEVIS records for those who have applied for Adjustment of Status to US perimemnt residence.
Answer: DHS indicated that it students should maintain all terms and conditions of their nonimmigrant status while an application for COS is pending, because if the COS applications were denied, then the student would be immediately out of status.
DHS similarly recommend that students maintain the terms and conditions of F status after filing an I-485 application for adjustment of status. DHS indicated that this would protect student in the event that the adjustment petition is denied (NAFSA note: DHS has told NAFSA in prior liaison calls that the questions of SEVIS/F/M status during the pendency of an adjustment application is currently being review by BCIS and BICE general counsels. That guidence has not yet been disseminated)."