H1-B Renewal time period with approved I140s, and which to use

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Below is my information and question. 

 

Oct 2007: H1B Starts, valid till Oct 2010 (Company A) 

Oct 2010: H1B Renewal, valid till Oct 2013 (Company A) 

July 2011: Received Approved I-140 Copy in my hand (Company A) 

July 2012: H1B Transfer, valid till July 2015 (Company B) 

June 2014: Received Approved I-140 Copy in my hand (Company B) 

July 2015: H1B Renewal, valid till Sept. 2017 (Company B) 

Dec 2016: H1B transfer to new Company C (Company C) 

 

Questions: 

1. Will I get H1B valid till December 2019, with this H1-B Transfer Application to Company C, since I have approved I-140? 

 

2. Can I use I-140s from EITHER Company A or Company B to include in this H1B transfer? Should I have a preference? (I believe both I140s are unrevoked and I have physcal copy on hand)