

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 BB, and your holding is [King of Spade and Jack of Club].
Before the flop, SB raise 3.0 chips, and BB call. Assume that all other players that is not mentioned folded.
The flop comes Ten Of Diamond, Six Of Heart, and Four Of Heart, then SB check, and BB check.
The turn comes Eight Of Diamond, then SB bet 5 chips, BB raise 16 chips, and SB call.
The river comes Queen Of Diamond, then SB check.
You currently have High Card(K-high).

Now it is your turn to make a move.
To remind you, the current pot size is 38.0 chips, and your holding is [King of Spade and Jack of Club]. You currently have High Card.

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: