<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An 82-year-old man presents to the emergency department complaining of vision loss in his left eye. He states that it suddenly appeared as if a curtain was coming down over his left eye. It resolved after five minutes, and his vision has returned to normal. He has a history of coronary artery disease and type 2 diabetes. What is the most likely cause of this patients presentation?? A: Sclerosis and narrowing of retinal vessels, B: Deposition of retinal metabolism byproducts, C: Increased intraocular pressure due to a defect in the drainage of aqueous humor, D: lnflammation of the optic nerve, E: Cholesterol plaque embolization,  <response>: This is a clinical vignette describing a patient with transient monocular vision loss. The key details are the patients age, vascular risk factors like coronary artery disease and diabetes, the transient and painless nature of the vision loss, and the description that it was like a curtain coming down over the eye. This presentation is most consistent with amaurosis fugax, which is caused by transient ischemia of the retina due to embolization of plaque from the carotid artery. E: Cholesterol plaque embolization 