

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 BTN, and your holding is [King of Diamond and Eight of Club].
Before the flop, BTN raise 2.5 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 BB check, and BTN check.
The turn comes King Of Heart, then BB check.


Now it is your turn to make a move.
To remind you, the current pot size is 5.0 chips, and your holding is [King of Diamond and Eight of Club].

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: