Hello everybody I'm still thinking about a hand i recently played.
I'm  at NL100 6max table with 100$ 
I'm in the cut off with Ac6c and open raise 3$, just the BB calls.
Flop comes 7c 8s 9d. Oppo checks I cbet  4$ he calls.
Turn 2h, he checks, I overbet for 17$ and he calls again.
River an A comes. 
So I didn't really know how to play that.
What's the best action with a random oppo??Help please :)