Master the 2026 InQuizitive Editing Challenge – Spot Those Errors Like a Pro!

The main idea here is reproducing quoted material with correct capitalization and punctuation. The best version preserves the sentence exactly as it would appear in standard writing: it starts with a capital H in “Human,” uses normal sentence-case capitalization for the rest, and ends with a period inside the closing quotation marks. This matches how a complete quoted sentence should appear in English, and it keeps Barker and Pollan’s wording intact about how human activity has turned the carbon system in soil into a toxic atmospheric gas.

The other options falter because they mishandle capitalization at the start of the quote (beginning with a lowercase “human”) or otherwise misrender the quotation’s formatting, which would distort the original text. Keeping the original capitalization and punctuation is essential for a faithful quotation, so the version with the capitalized first word and proper sentence structure is the correct one.