

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 [Queen of Spade 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 Ace Of Diamond, Nine Of Heart, and Eight Of Heart, then BB check, and CO check.
The turn comes Three Of Spade, then BB bet 4 chips, CO raise 13 chips, and BB call.
The river comes Two Of Heart, then BB check.
You currently have One Pair(One Pair, Queens with Ace, Nine, Eight kickers).

Now it is your turn to make a move.
To remind you, the current pot size is 31.0 chips, and your holding is [Queen of Spade 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: