Question

in literature, an ideal knight would be a man who
o fought and slew a dragon.
o wrote beautiful love songs.
o had excellent courtly manners.
o told stories about worldly adventures.

Explanation:

In literature, an ideal knight is often depicted as having excellent courtly manners. Courtly love and chivalry emphasized such qualities. While fighting a dragon (more of a heroic deed in some tales but not the core of being an ideal knight in the courtly sense), writing love songs (could be part of courtly love but not the defining characteristic of an ideal knight), and telling worldly adventure stories (not the main trait) are not as central as courtly manners. Courtly manners encompassed respect, courtesy, and proper behavior in the courtly setting which was a key aspect of the ideal knight's portrayal in literature.

Answer:

had excellent courtly manners.