

You are a specialist in playing 6-handed No Limit Texas Holdem. The following will be a game scenario and you need to make the optimal decision.

Here is a game summary:

The small blind is 0.5 chips and the big blind is 1 chips. Everyone started with 100 chips.
The player positions involved in this game are UTG, HJ, CO, BTN, SB, BB.
In this hand, your position is SB, and your holding is [King of Heart and Nine of Heart].
Before the flop, SB raise 3.0 chips, and BB call. Assume that all other players that is not mentioned folded.
The flop comes Jack Of Club, Jack Of Heart, and Four Of Spade, then SB check, and BB check.
The turn comes Ten Of Spade, then SB bet 8 chips, and BB call.
The river comes Eight Of Club, then SB check, and BB bet 17 chips.
You currently have One Pair(One Pair, Jacks with King, Ten, Nine kickers).

Now it is your turn to make a move.
To remind you, the current pot size is 39.0 chips, and your holding is [King of Heart and Nine of Heart]. You currently have One Pair.

Decide on an action based on the strength of your hand on this board, your position, and actions before you. Do not explain your answer.
Your optimal action is: