Que línea debería tomar en esta mano?

Hand converted with online PokerStrategy.com hand converter:
$0.1/$0.25 No-Limit Hold'em (8 handed)
Known players:
[tg]BB$39.32:///////;UTG2$95.86:///////;MP1$25.35:///////;MP2 (Hero)$9.65:///////;MP3$26.96:///////;CO$17.54:///////;BU$8.95:///////;SB$21.90:///////;[/tg]
Preflop: Hero is MP2 with K:h, A:d.
2 folds, Hero raises to $1.00, MP3 folds, CO calls $1.00, 3 folds, 2 folds, BB folds.
Flop: ($2.35) J:s, 3:c, 7:c (2 players)
Hero bets $1.25, CO calls $1.25.
Turn: ($4.85) 4:c (2 players)
Hero checks, CO checks.
River: ($4.85) 6:s (2 players)
Hero checks, CO bets $2.00, Hero folds, CO gets uncalled bet back.
Final Pot: $4.85.