JTo in the CO

Loose UTG open limps, Loose LJ limps. Both of these players raise a decent amount pre. UTG plays very passive post. LJ plays ok post. It's folded to me in the CO and I raise JsTc, it's folded to the loose BB who calls. The BB will donk top pair on the flop or on the turn if he improves. He plays draws passively. He will peal super lightly on the flop. The UTG and LJ call.

Qc4c3d...It's checked to me and I bet, BB calls, UTG folds and LJ calls.

Qc4c3d4h...It's checked to me. I don't think either player has a Q. They might have a 4 or 3 or small pocket pair. BB could have 56 or a flush draw. He's less likely to have a 4 because I think he might donk it although I could be wrong. LJ would probably CR 56 or a flush draw on the flop.

Do I fire again or just give up? If I bet am I committed to firing again on the river if one or both call?

Is my raise correct pre flop? If I was on the button I would have just over limped. I figured getting the button out was worth the raise.

Is my C bet on the flop reasonable?

I have a good image. I don't always C bet especially 4 way or more.