The documentations are very samilar. Since

來源: 於 2005-11-29 10:17:54 [舊帖] [給我悄悄話] 本文已被閱讀：次

one petition is done, I consider the other two are 80% done. Just in case if one denied, the other one is already in. But I agree with you that the NIW has the best chance.
Now do I need to answer YES when I fill the later I-140 form? What's the implication? Thank you!