The section of this passage that is an example of a dependent clause is A, that is, the one that reads "for the latest horror movie". Dependent clauses cannot stand on their own as they can not express a complete thought by themselves. Take sentence A
*For the latest horror movie
It only makes sense when it is preceded by "after bowling a couple of games". All the other options (B, C and D) represent sentences that can stand on their own because they express a complete thought.
