

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 Diamond and Queen 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 Jack Of Heart, Four Of Heart, and Five Of Spade, then BB check, and CO check.
The turn comes Two Of Diamond, then BB check, CO bet 4 chips, and BB call.
The river comes Queen Of Club, then BB bet 7 chips, and CO raise 25 chips.
You currently have One Pair(One Pair, Queens with King, Jack, Five kickers).

Now it is your turn to make a move.
To remind you, the current pot size is 45.0 chips, and your holding is [King of Diamond and Queen 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: