ACL tear with discontinuous fibers at proximal femoral attachment on MRI knee

A 22-year-old male footballer sustained a non-contact pivoting injury to his left knee with an audible pop and immediate giving way. Clinical examination reveals a positive anterior drawer test and positive Lachman test at 30° flexion with a firm endpoint absent (Grade 2A), and a positive pivot shift test. Sagittal proton-density fat-saturated MRI of the knee is shown. The structure marked **D** demonstrates wavy, discontinuous fibers with disruption near the femoral attachment, accompanied by bone bruises at the lateral femoral condyle and posterolateral tibial plateau (kissing contusion pattern). Which of the following is the MOST APPROPRIATE next step in management after initial RICE and early range-of-motion physiotherapy for 4–6 weeks?