A 72-year-old man presents for an out patient follow up after being discharged from the hospital two days ago. He was admitted for a transient ischemic attack on the right side of his body which resolved spontaneously. He was worked up and subsequently discharged. Review of his in-patient investigations reveal a carotid doppler which revealed 100% stenosis of the left carotid artery and a 40% stenosis of the right carotid artery. He smoked about 1 pack per day for past several years. His past medical history includes chronic atrial fibrillation for which he has been on Aspirin alone. During the last admission, he was started on Coumadin as well. Today, his INR is therapeutic at 2.5 . His fasting lipid profile shows a calculated LDL cholesterol of 60mg%.  On examination, there are no neurological deficits. His blood pressure is 110/70 mm Hg. In addition to recommending smoking cessation and lifestyle changes along with continuation of coumadin, which of the following is most appropriate at this time?

A) Carotid Endarterectomy of Right Carotid Artery
B) Carotid Stenting of left carotid artery
C)  Carotid Endarterectomy of Left Carotid Artery
D) Carotid Magnetic Resonance Angiography
E) No other intervention indicated