<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 45-year-old man presents to the physician with complaints of burning pain in both feet and lower legs for 3 months. He reports that the pain is especially severe at night. He has a history of diabetes mellitus for the past 5 years, and he frequently skips his oral antidiabetic medications. His temperature is 36.9C 98.4F, heart rate is 80min, respiratory rate is 15min, and blood pressure is 12080 mm Hg. His weight is 70 kg 154.3 lb and height is 165 cm approx. 5 ft 5 in. The neurologic examination reveals loss of sensations of pain and temperature over the dorsal and ventral sides of the feet and over the distal one-third of both legs. Proprioception is normal; knee jerks and ankle reflexes are also normal. The tone and strength in all muscles are normal. The hemoglobin A1C is 7.8. Involvement of what type of nerve fibers is the most likely cause of the patients symptoms?? A: Aα Aβ fibers, B: Aβ Aγ fibers, C: Aγ B fibers, D: Aδ C fibers, E: Aγ C fibers,  <response>: This is a question about diabetic neuropathy. The patient is a 45-year-old man with a 5-year history of diabetes mellitus who is noncompliant with his medications. He presents with burning pain and loss of pain and temperature sensations in his feet and lower legs. His reflexes are intact. Based on the sensory loss limited to pain and temperature, this suggests involvement of small unmyelinated C fibers and small lightly myelinated Aδ fibers, which carry pain and temperature sensations. Larger myelinated Aβ fibers carrying proprioception are intact, explaining the preserved reflexes. Therefore, the answer involves Aδ and C fibers.D: Aδ C fibers 