H1B Transfer RFE - I94 Expired Sameday

Hi All, My current H1B visa was expired on 30th June 2018 and I-94 was expired on 10th July 2018. I have filed my H1B extension from company A on 1st May 2018 through normal processing and it is currently under processing (Case Received). I got an offer from company B and they filed H1B transfer through premium processing on 10th July 2018 (Same day of my I-94 expiry) based on company A H1B extension notice. And now for Company B Transfer petition, USCIS issued a RFE stating that USCIS will not adjudicate Company B H-1B petition until they first make a final decision about Company A pending H-1B extension petition. And gave me below options: Option 1: Upgrade Company A extension to premium processing, which will result in a decision in 15 calendar days. Once you receive the approval, we can submit a copy of the approval to USCIS to adjudicate the Company B Transfer. Option 2: Do nothing – wait until USCIS adjudicates Company A H-1B extension (hopefully before the response to the RFE is due on October 12, 2018. And now I decided to choose Option 1: and go with premium processing for company A. Can you please answer for the below questions? 1. Why company B transfer went to RFE even the documents were submitted to USCIS on or before my I-94 expiry(When I was still in status)? Is there anything Company B can do? 2. What if I choose Option 2: and if there is no update on Company A extension after Company B RFE Due date? 3. What if Company A extension got deny in the worst case, Do I need to lose hope on Company B offer? Please help me.