A patient with clinically signifacant diabetic macular edema with non progressive diabetic retinopathy was treated with Macular grid photocoagulation.The patient still has vitreo macular traction.What is the preferred treatment?

• A. Pars plana vitrectomy
• B. Intravitreal bevacizumab
• C. Augmented macula photocoagulation
• D. Repeat macular grid photocoagulation