Correct Answer & Explanation
Option A
• When negative imperative commands ('Do not...') are transformed using the reporting verb 'forbade', a negative word ('not') is NOT used in the reported clause because 'forbade' already carries a negative meaning.
• 'this gate' changes to 'that gate' and 'your' changes to 'his' (or 'her').
• Option B creates a double negative, while option A is grammatically flawless.