AIDS would be the disease you're referring to:)<span />
Answer:
Barbary corsairs led attacks upon American merchant shipping in an attempt to extort ransom for the lives of captured sailors, and ultimately tribute from the United States to avoid further attacks, as they did with the various European states.
Explanation:
They were expected to focus only on their homes and families.
The most likely theme to be found in a medieval ballad would be A - the battle of good versus evil. Medieval ballads often focused on struggles where the good would have to defeat the evil; angels defeating satan; a good and charming prince defeating an evil and usurping force, etc.