Form I-140

My husband has an I-140 approved from Company A ( Priority Date April 2008 , EB2). He is now eligible for EB1 under Employer B ( He is currently on L1 A ). Can his priority date from EB2 be ported to EB1 ?

I have an H-1B visa stamped from employer A and the employer B has filed my H-1B (Transfer visa) based on the H-1B petition visa from employer A. Now, my H-1B visa filed by employer B is on RFE and my employer A wants to file the GC based on my previously approved i-140 from employer C. Below are my questions: <br>

1. Can I reject the offer from employer B and still continue to work with employer A on current Visa if my H-1B from employer B is approved?<br>
2. Can I reject the offer from employer B and still continue to work with employer A on current Visa if my H-1B from employer B is denied?<br>
3. In case my visa from employer B is rejected do I need to leave the country and come on the stamped visa which I have now?<br>
4. Can I ask employer A to file my Green Card even if my H-1B from employer B is rejected or approved without any issues or do I need to provide any visa documentation to employer A on my petition from employer B being approved or rejected?
Can I immediately file the Green Card with employer B (after joining the employer B office) if my visa from employer B is approved?

I am currently working with employer A on H-1B visa with I-140 approved for over 180 days. My wife is on F-1 EAD. I am planning to move her visa status from F-1 to H-4 EAD AFTER I join Employer B next month based on my approved I-140 from my employer A. <br>

My questions are:<br>
1. Once I join employer B, will I be able to apply for my wife's H4 EAD based on approved I140 which I have from employer A? Can I apply both visa status change (F1 to H4) and application for H4 EAD concurrently?<br>
2. In other words, will changing my employer impact my wife's eligibility to get H-4 EAD based on my approved I-140 from previous employer?<br>
3. Can I change multiple employer based on I-140 approved from employer A? If yes, what if employer B has already started green card process (PERM)?<br>
4. If I get I-140 approved from employer B also then what will happen to I-140 approved with employer A?

I have I-140 and I-485 pending. H-1B ended on May 2018 and applied for extension which is pending.
Spouse entered US under parole status and is valid till December 2018, H4 visa has expired in May 2018
Can spouse apply for H-4 extension after approval of H-1B extension? If so can it be done from USA or have to travel abroad for H-4 visa stamping?

Present Status: I-140 is approved and priority date Jan 2016. I completed my MS in USA. My company attorney/HR is telling me I can't get promotion till I get my green card approved. As per them this is Immigration law or this is part of green card process. Can you please confirm if there is immigration law which tells that if your green card is pending then Job title can't be changed and promotion can't be awarded?

I am currently on L-2 EAD (since Jun 2017) and work for Employer A. Can my current employer (Employer A) file for my Green Card ?

I have the following questions<br>
Can employer A revoke my current I-140 after I change my employment?<br>
Can I keep getting my visa renewed with Employer B based on my current I-140 with Employer A until Employer B initiates my GC processing?<br>
Does the hike in pay and change in roles in any way affect any of my future GC filings with Employer B?