H1B Amendment denied after 180days

have valid H1B visa till 2019 SEP. Working for client through a company since March 2017, amendment filed on March 17th for new client and new location ,its in RFE .

if employer not able to provide the evidence ,in case if amendment denied, what are possible options I have

1)My original H1B visa and I797 are still valid to transfer to another employer?

2)can I work from original location for the same employer?

3)Before the amendment turned to denied , can I apply for visa transfer to new employer?