

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 UTG, and your holding is [Ace of Club and Nine of Club].
Before the flop, UTG raise 2.0 chips, and BTN call. Assume that all other players that is not mentioned folded.
The flop comes Jack Of Spade, King Of Spade, and Five Of Diamond, then UTG bet 4 chips, and BTN call.
The turn comes Eight Of Heart, then UTG bet 10 chips, and BTN raise 32 chips.
You currently have One Pair(One Pair, Fives with Ace, King, Jack kickers).

Now it is your turn to make a move.
To remind you, the current pot size is 55.0 chips, and your holding is [Ace of Club and Nine of Club]. 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: