Explanation

In English grammar, adjectives can express three degrees of comparison positive, comparative and superlative. The positive form simply names a quality (e.g., bad). The comparative form shows a higher or lower degree of that quality when comparing two entities (e.g., worse). The superlative form indicates the highest or lowest degree of the quality among three or more entities (e.g., worst).

1. Regular Pattern for One-Syllable Adjectives
• Most one-syllable adjectives form the comparative by adding “-er” and the superlative by adding “-est.”
– tall → taller → tallest
– cold → colder → coldest

2. Irregular Pattern for “Bad”
• Although “bad” is one syllable, it does not follow the regular “-er/-est” pattern. Instead:
– Comparative: worse
– Superlative: worst

3. Why “baddest” Is Incorrect
• “Baddest” is a nonstandard, colloquial form sometimes used in slang, but it is not accepted in formal or academic English.
• Standard usage requires “worst” when you want the superlative of “bad.”

4. Option Analysis
A) baddest – nonstandard/slang; not correct in formal English
B) worst – correct superlative form of “bad”
C) worse – comparative form, not superlative
D) good – unrelated adjective

Because “worst” uniquely functions as the superlative of the irregular adjective “bad,” it is the correct choice.

Summary:
“Bad” is irregular: its comparative form is “worse,” and its superlative form is “worst.” Among the options given, only “worst” correctly serves as the superlative degree.