[Apanage]

I think it is really close between C/C and Bet/F.
If we make villain really stereotyped meaning that he is on river with his entire range. That he calls any A high hand and never bets them if checked too.
At the same time he bluffbets every river with a worse hand when checked too.
Then it seems that if villain bluffraises river less than 1 of 9 times then Bet/folding is better than check/caling.
Lots of if:s and buts though.Not just around his assumed actions but also around my calculations.

I think check/folding is a lot worse since he probably puts in another bet with a bad hand on river because he has no choice and because it lies in his nature.

Equally I think bet/calling is worse because a lot of the hands you´re beating consists of A-high hands and he would be content with just calling them.