The weather today is even _______ than yesterday.
B
Correct answer
Explanation
The comparative form of 'bad' is 'worse' (an irregular adjective). We use 'worse' when comparing two things: 'worse than yesterday.' 'Bad' is the base form, 'badder' is incorrect (not a valid word), and 'worst' is the superlative (used for three or more: worst of all).