A 27yrs lady presents with a palpable thyroid nodule,and needle biopsy demonstrates amyloid in the stroma of the lesion.A cervical lymph node is palpable on the same side as the lesion.The best treatment should be

• A. Removal of the involved lobe,the isthmus,a portion of the opposite lobe,and he enlarged lymph node
• B. Removal of the involved node,the isthmus,and the enlarged lymph node.
• C. Total thyroidectomy and irradiation of the cervical lymph nodes
• D. Total thyroidectomy and modified neck dissection on the side of the enlarged lymph node