Final answer:
The more than comparative form for 'mauvais' in French is 'plus mauvais'
Step-by-step explanation:
The more than comparative form for 'mauvais' in French is 'plus mauvais'.
For example, you can say, 'Cette situation est plus mauvaise que je ne pensais' which means 'This situation is worse than I thought'.
Therefore, the correct option is 'Oplus pire'.
Learn more about Comparative form of adjectives