Final answer:
The correctly coded text is Option 3: The girl were mad [Ew: was], which uses proper editing notation and corrects the subject-verb agreement.
Step-by-step explanation:
The text that is coded correctly from the options provided is Option 3: The girl were mad [Ew: was]. This is because it correctly uses square brackets to indicate the editing notation, with the incorrect form ('were') mentioned first, followed by the editorial suggestion ('was') after the colon. The correct verb form to match the singular subject 'girl' is 'was', not 'were'.
In English grammar, singular subjects must be paired with singular verbs to maintain subject-verb agreement. Hence, correcting 'The girl were' to 'The girl was' aligns with standard English grammar rules.
The correct coding of the sentence would be Option 3: The girl was mad [Ew: was]. This option has the correct use of subject-verb agreement by using the singular form 'was' to match the subject 'girl'.