Final answer:
Virgil becomes angry with Dante at the end of Canto 30 in Dante's Divine Comedy because Dante disobeys Virgil's instruction to remain silent during a conversation with Ulysses.
Step-by-step explanation:
In Dante's Divine Comedy, Virgil becomes angry with Dante at the end of Canto 30 because Dante disobeys Virgil's instruction to remain silent during a conversation with Ulysses.
Dante's interruption angers Virgil because he sees it as a display of pride and disobedience, which goes against the moral lessons and guidance Virgil has been providing throughout their journey through Hell.