Answer: D. because he feels the exam was painfully tough
Explanation:
Verbal irony: a figure of speech when somebody means something other than what they said/they reality.
Paul says that the exam was as pleasant as a root canal, and root canals are not pleasant at all. This tells us that Paul did not find the exam nice, rather, he found it painful, hence he meant the opposite of what he actually said.
At first it almost seems to inform you but then it says they make wonderful pets.
So the answer I believe is "to persuade"
Hope this helps! Marking me the brainiest and leave a thanks is much appreciated. ;)
