This shape has come up in a couple of my games. How might I continue as black?

[goban sgf=https://openstudyroom.org/media/machina/attachments/dbl_app_q.sgf][/goban]

.

Here is a fragment of a game I played recently. After move 8, black needs to defend or will have the dead "big pig snout" shape.

My question is how to continue for Black after move 8.

A and B seem like the obvious choices. Actually, now I'm …