Should i take a stab on the turn?

[terencetsao]

Poker Stars
Limit Holdem Ring game
Limit: $0.50/$1
10 players
Converter

Pre-flop: (10 players) Hero is BB with 9[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/diamond.gif[/img]
UTG folds, UTG+1 calls, 4 folds, CO (poster) checks, 2 folds, 2 folds, Hero (poster) checks.

Flop: 4[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (3.5SB, 3 players)
Hero checks, UTG+1 checks, <font color="#cc0000">CO bets</font>, <font color="#cc0000">Hero raises</font>, UTG+1 folds, CO calls.

Turn: A[img]/images/graemlins/spade.gif[/img] (3.75BB, 2 players)

I put CO on high cards so i c/r the flop hoping that he would fold. The turn card is scary, i dont know if i should
1. bet and then c/f the river
2. c/f the turn
which line is better?