Which issue should be corrected first when editing for readability?

• A. Spelling
• B. Punctuation
• C. Capitalization
• D. Run-on sentences

Answer: (D)

Focusing on sentence structure that blocks understanding is the key when editing for readability. Run-on sentences are the biggest obstacle because they cram two or more complete thoughts into one long, boundary-less line. When readers can’t clearly see where one idea ends and another begins, meaning gets lost even if the words are correct. The quickest way to restore clarity is to separate those ideas with proper endings or with punctuation plus joining words, so each idea stands on its own or is clearly linked to the next.

For example, turning a string like “The rain started we stayed inside” into “The rain started. We stayed inside.” or “The rain started, and we stayed inside” instantly improves understanding by clearly delineating actions and causes.

After the sentence boundaries are clear, you can tighten punctuation to guide pace, fix capitalization for sentence starts or proper nouns, and correct spellings to remove distractions. But until the run-on issue is addressed, readers will struggle to grasp the intended meaning, no matter how good the other edits are.