He has played almost every hand since we started so has a wide range. He would 6x every open. Post flop he bets when strong and shows his hand, has called light, but just took down 3 out of last 4 pots so dominating. Staring at me hard during this hand and seems to want the rush to continue.
Pot is 3,200 and I bet 1,800.
Villain calls pretty quickly.
River is

So the board is

What is the nut best option in this spot vs this player please, is it c/f, c/c or b/f?