

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 SB, and your holding is [Nine of Club and Eight of Heart].
Before the flop, SB raise 3.0 chips, and BB call. Assume that all other players that is not mentioned folded.
The flop comes Nine Of Diamond, Ten Of Spade, and Eight Of Spade, then SB check, and BB check.
The turn comes Five Of Diamond, then SB check, BB bet 5 chips, and SB call.
The river comes Two Of Spade, then SB check, and BB bet 12 chips.
You currently have Two Pair(Two Pair, Nines and Eights with Ten kicker).

Now it is your turn to make a move.
To remind you, the current pot size is 28.0 chips, and your holding is [Nine of Club and Eight of Heart]. You currently have Two 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: