Select the most appropriate option to fill in blank no. 2.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1, i.e., worst.
Filler Concept: We need the superlative form to describe the highest degree of severity among all fires.
Grammatical Explanation:
worst is the superlative form of bad.
worse is the comparative form.
more worse is grammatically incorrect.
bad is the base form.
Correction: worst
Final Sentence: …helped contain the worst fires ever.
Conclusion: The correct option is worst.