L1B Extension RFE

Hi Here is my case... I was on L1B and had VISA Expiration Date of 21Dec2012 and I have an i94 Stamped Date as 17Nov 2015. My employer had submittied L1B extension on 17Dec2012 (ie 3 days before my VISA Expiry Date). Currently i got an RFE on my Extension. RFE response is due on 9th April 2013

1>Due to fact that my Extension can get rejected post RFE , Can i stop my VISA extension Procedure now?
2>After i stop my VISA Extension Procedure ,can i continue to stay here on my I94 date? ie can i stay here legally 17Nov 2015?