<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 61-year-old man is brought to the emergency department by his son after collapsing to the ground while at home. His son immediately performed cardiopulmonary resuscitation and later the patient underwent successful defibrillation after being evaluated by the emergency medical technician. The patient has a medical history of hypertension, hyperlipidemia, and type II diabetes mellitus. He has smoked one-half pack of cigarettes for approximately 30 years. The patient was admitted to the cardiac intensive care unit, and after a few days developed acute onset right upper extremity weakness. His temperature is 99F 37.2C, blood pressure is 14591 mmHg, pulse is 102min and irregularly irregular, and respirations are 16min. On physical examination, the patient is alert and orientated to person, place, and time. His language is fluent and he is able to name, repeat, and read. His strength is 55 throughout except in the right hand, wrist, and arm, which is 25. Based on this patients clinical presentation, the affected neuronal fibers decussate at which level of the central nervous system?? A: Primary motor cortex, B: Thalamus, C: Pons, D: Caudal medulla, E: Spinal cord,  <response>: This is a clinical vignette describing a 61-year-old man with a history of hypertension, hyperlipidemia, diabetes, and smoking who collapsed at home and underwent successful resuscitation and defibrillation. He later developed acute right upper extremity weakness. Based on the description of contralateral weakness, this suggests a stroke involving the left side of the brain. The question asks at what level the affected neuronal fibers decussate, which refers to where fibers from the right side of the brain cross over to control the left side of the body. This decussation occurs at the level of the medulla oblongata.D: Caudal medulla 