The correct question tag is "does she?" Question tags use the auxiliary verb (or "do/does/did" if no auxiliary is present) and the pronoun from the main clause, and they are opposite in polarity (positive sentence, negative tag; negative sentence, positive tag). Since the main clause is negative in meaning ("rarely attends"), the tag is positive ("does she").
Context of Question Tags: Question tags are used to confirm or check information. When the sentence is negative, the tag is positive, and vice versa.