What is the coach going to do ___ he knows his team so well.

are they all correct

being that
being as
seeing that
seeing as

I'm not very fond of any of the choices. I would say "since."

I would choose "seeing that",but wait and see other answers.
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I will need the power of attorney from Vicky, seeing that she signed on behalf of her father
 Englishmaven's reply was promoted to an answer.