Hi,
I took a look at one of the NL quizes and the below hand came up, where the river brings some sad action. However I would like to know what you think Hero should do with the following adjustment to the river action:

River: ($13.50) A (3 players)
UTG check, CO check, Hero bets $9, UTG raises to $30, 1 fold, Hero ?


Stacks & Stats
BB ($100.00) (34/4/0.7/32/321) [VPIP/PFR/AF/WTS/Hands]
SB ($100.00)
UTG ($100.00) (40/12/1.2/30/180) [VPIP/PFR/AF/WTS/Hands]
MP ($100.00)
CO ($100.00)
Hero ($100.00)

Preflop: Hero is BU with J , T
UTG calls $1.00, 1 fold, CO calls $1.00, Hero calls $1.00, [color=grey]1 fold, BB calls $1.00

Flop: ($4.50) Q, K, 4 (4 players)
UTG checks, CO bets $3.00, Hero calls $3.00, 1 fold, UTG calls $3.00

Turn: ($13.50) 2 (3 players)
UTG checks, CO checks, Hero checks

River: ($13.50) A (3 players)
UTG bets $9.00, CO raises to $30.00, Hero...

How do you continue playing?