Step 1: Understand countable nouns.
"Days" is a countable noun, and when comparing countable things, we use "fewer" rather than "less." Step 2: Analyze each option.
- (A) less: Incorrect. "Less" is used for uncountable nouns, not countable ones like "days."
- (B) little: Incorrect. "Little" refers to small quantities of uncountable nouns.
- (C) fewer: Correct. "Fewer" is used for countable nouns like days.
- (D) any: Incorrect. "Any" does not fit the comparative context. Step 3: Conclusion.
The correct sentence is "February has fewer days than March."