Final answer:
The excerpts provided do not contain information about what the Bulgar captain did with Cunegonde from Voltaire's 'Candide.'
Step-by-step explanation:
The question pertains to an event in Voltaire's satirical novel, Candide, rather than historical events involving sultans. In Candide, the character Cunegonde does indeed face various challenges, but the specific event concerning a Bulgar captain is not among those mentioned in the three excerpts provided. Therefore, to provide a straightforward answer in this context: the Bulgar captain does not sell her as a slave, marry her, release her, or kidnap her again within these excerpts. However, it is important to read the text in question to understand what happens to Cunegonde in the novel as a whole.