老師您好！
感謝您之前解答了我的很多問題！我的485 Pending, 現在收到RFE要求Supplement J. 原文要求如下：
"The record establishes that you are the Principal Applicant of an Employment-Based For I-485. In order to continuje processing of your case, you must submit a properly completed and signed Supplement J, Confirmation of Bona Fide Job Offer or Request for Job Portability Under INA Section 204(j), showing that the offer of intended permanent employment as stated in the Form I-140 continues to exist or that you intend to port to a new offer of employment in the same or similar occupational classification as the job specified in the underlying Form I-140."
我的情況是一直在同一個公司工作，EB2 I-140。後來想降級到EB3, 但是Approved I-140還是EB2。所以我有兩個EB2 I-140。我的485是用第一個I-140申請的。I-485 pending已經8個月。
請教老師：
1. 這個RFE隻要求我交Form Supplement J 是嗎？我還要交其他證明材料（e.g. Employment Verification Letter）嗎？
2. 我要選擇哪一項: "1a. Confirm that the job offered to you in the Form I-140, that is the basis of your Form I-485, remains a bona fide job offer you intend to accept once your Form I-485 is approved." 還是"1b. Request job portability under INA section 204(j) to a new, full-time, permanent job offer that you intend to accept once your Form I-485 is approved."？我沒有換工作，也沒打算換公司。
3. 可以叫律師幫我交這個Form Supplement J 和其他需要的材料嗎？
4. 我收到RFE，是因為交I-485時沒有交Supplement J，還是因為我有兩個EB2 I-140？
5. How do I know whether USCIS has received the RFE documents I responded or not？
非常感謝老師辛苦解答！
