kicked out in August

You also have no claim to providing more than 50% of your own support for the entire year either. Bottom line is, your qualify to be claimed as a dependent on your parent's tax return. It doesn't matter how much money you made either. Also doesn't matter if they actually claim you or not either. The key word in the IRS Pub is that you "QUALIFY" as their dependent.

So you really don't have a choice here, and must select the option for "I can be claimed on someone else's tax return" weather they actually claim you or not.