H1B, H4 Visa

I travelled to US 4 months (Oct 2017) back with H1B to a Location for client A and within 2 months I had to move to different location for client B under same Employer. My H1B was about to expire in 9 month and hence my employer filed for location transfer as well as extension. My petition went to RFE and got denied 2 days back.I am currently in US (location B). I need to continue in the location for client B and there is no way to work for old client A.

I am yet to get the official notice stating the reason for denial. What are the possible way out for me. My employer is ready to take up any measure to make me continue in US. I am eligible for L1B.

1. Can I file for appeal against my denial from location B
2. Try for H1B to L1B conversion (as i am working in a specialized field) from my new location B.
3. Should I go back to old location A and file for location transfer and extension again from there. Please guide