$5.5: TT on A flop

[Askilus]

Ultimate Bet No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) converter

MP3 (t1350)
CO (t1470)
Hero (t3170)
SB (t2425)
BB (t1470)
UTG (t1420)
UTG+1 (t605)
MP1 (t1580)
MP2 (t1510)

Preflop: Hero is Button with T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img].
<font color="#666666">4 folds</font>, MP3 calls t20, CO calls t20, <font color="#CC3333">Hero raises to t80</font>, <font color="#666666">2 folds</font>, MP3 folds, CO calls t60.

Flop: (t210) 9[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">CO bets t210</font>(using the pot bet button), Hero ???

Which range should I put villian on here? I don't have any read on him yet, sorry. I guess a weak ace is a very likely holding for him here? What's my action? And PF, too small raise? Is limping an option?