<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 42-year-old woman comes to the physician because of progressive weakness. She has noticed increasing difficulty performing household chores and walking her dog over the past month. Sometimes she feels too fatigued to cook dinner. She has noticed that she feels better after sleeping. She does not have chest pain, shortness of breath, or a history of recent illness. She has no personal history of serious illness and takes no medications. She has smoked two packs of cigarettes daily for 25 years. She appears fatigued. Her temperature is 37C 98.8F, pulse is 88min, and blood pressure is 14880 mm Hg. Pulse oximetry shows an oxygen saturation of 98 in room air. Bilateral expiratory wheezes are heard at both lung bases. Examination shows drooping of the upper eyelids. There is diminished motor strength in her upper extremities. Her sensation and reflexes are intact. A treatment with which of the following mechanisms of action is most likely to be effective?? A: Inhibition of acetylcholinesterase, B: Stimulation of B2 adrenergic receptors, C: Removing autoantibodies, immune complexes, and cytotoxic constituents from serum, D: Reactivation of acetylcholinesterase, E: Competitive blocking of the muscarinic receptor,  <response>: This is a clinical vignette describing a 42-year-old woman with progressive weakness, fatigue, and drooping eyelids. The key findings are progressive muscle weakness, fatigue, drooping eyelids, and expiratory wheezes on lung exam. This presentation is most consistent with myasthenia gravis, an autoimmune disorder caused by antibodies against acetylcholine receptors at the neuromuscular junction. The question asks about a treatment with the most appropriate mechanism of action for this patients condition.A: Inhibition of acetylcholinesterase 