What's the best line here?

[skammer]

BB has 9c 8h
Folded to button who open raises. Sb calls. Bb calls. Flop is 2c Ah 9s. Sb checks. Bb ? What if the sb had folded preflop? Thanks in advance.

[dave44]

98o is about the lowest I'll go defending from the BB, but you can probably call whether or not the SB comes along. I would check-raise this flop and bet the turn. Any aggression from SB or button in the midst of this would probably force me to fold.