One more river spot

[PokerBob]

Canterbury 15/30 9 handed
CO is a donkey who coldcalls waaaaay too much with hands like QJo, KTs and other junk. Button plays pretty well postflop, but also CC's waaaaay too much. They know who I am and know I am no dummy.

I raise QQ UTG. folds to CO and button who CC, blinds fold.

flop 3 ways: JJ7r

I bet, both call.

turn: J

I say, "I don't have a jack and bet", both call.

river: K
my line?

Bet/fold.

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Bet/fold.

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I would like to know more about these characters before I would use the bet fold line. Is either one of them tricky enough to raise this river without a King or a Jack? If not then bet fold looks right. However I prefer the check/call line if I feel I cannot safely lay down to a raise.

[Jeffage]

I would probably check call also (but not overcall) as well.

Jeff