Which proofreading skill focuses on recognizing and correcting errors in sentence structure, subject-verb agreement, and clause construction?

• A. Identifying which portion of the sentence is grammatically incorrect
• B. Identifying incorrect number usage
• C. Punctuation correction
• D. Spelling accuracy

Answer: (A)

This item tests your ability to spot grammar and syntax problems by identifying exactly which portion of a sentence is grammatically incorrect. Errors in sentence structure, subject-verb agreement, and clause construction all come from how the sentence is built, not just from the individual words, so the skill is about locating the specific segment that disrupts the sentence’s grammar. By pinpointing the problematic portion, you can adjust the structure, fix agreement, or rework clauses to produce a clear, correct sentence.

Punctuation, spelling, and number usage are separate proofreading concerns. Punctuation correction focuses on where to place marks like commas and periods, spelling accuracy on correct letter forms, and incorrect number usage on numeral form or quantity. While these issues can appear in the same sentence, they don’t address the broader structural and syntactic problems described in this item.