

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 CO, and your holding is [Four of Heart and Four of Diamond].
Before the flop, CO raise 2.3 chips, and BB call. Assume that all other players that is not mentioned folded.
The flop comes Queen Of Club, Eight Of Club, and Ace Of Club, then BB check, and CO check.
The turn comes King Of Heart, then BB bet 6 chips, CO raise 17 chips, and BB call.
The river comes Jack Of Heart, then BB bet 20 chips.
You currently have One Pair(One Pair, Fours with Ace, King, Queen kickers).

Now it is your turn to make a move.
To remind you, the current pot size is 59.0 chips, and your holding is [Four of Heart and Four of Diamond]. 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: