Fastest way terminal B to Terminal C in Newark airport

We are arriving on United from Europe (Barcelona) into Terminal B and then departing in Terminal C for a United domestic flight (San francisco) .
What are the recommended /required transfers/travel methods/security checks.
Please note: the similarly sounding question
Does NOT answer the question. in the answers they point out that the OP does not need to do B to C.Well.. we do .. So please do not mark this question as a duplicate of that one.
Also the following:
What is the connecting time to consider for International to International Transfers in US Airports?
That question is too general - lacking specifics for this terminal.
We are asking specifically for this airport: which method to go (walk, bus, monorail) and which security we need to pass.
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Can you walk between terminals at EWR?
Make your flight connection at EWR easy! There are three ways of transferring between terminals: AirTrain. Shuttle bus (Star Alliance Connections) Walk.Is 1 hour enough for connecting flights in Newark?
No, 1 hour is not remotely close to enough ahead of an international flight. EWR is a busy airport and has a lot of delays. The smallest delay in the first flight will cause you to miss the connection. I'd want two hours or preferably three just in case.Is there a shuttle between terminals at Newark?
A: The AirTrain is free to passengers traveling between the three Newark Airport terminals. You can also take the United Airlines Shuttle Bus to make connections between terminals. The shuttle is free, and you won't have to reenter security when using the United Airlines bus.How do I get from Newark Airport to Terminal C?
EWR Terminal C Detail You do not need to re-clear security to travel between Terminal A and Terminal C. United operates a frequent shuttle between the terminals. In Terminal A, you can catch the shuttle near Gate A28 \u2013 just follow the signs and go down one level to the ground-level shuttle boarding area.How to take airtrain for terminals A B C \u0026 D liberty airport ewr new Jersey
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