Question: Troy is a 9-year-old male who is doing well academically and socially. He began experiencing weakness in his legs; his movements were clumsy/sloppy and uncoordinated when he was playing and running. He was taken to a neurologist who noted unsteadiness in walking and weakness in the lower limbs and loss of appropriately sequenced and precise movements. Changes in Troy's speech included irregular and sometimes explosive changes in his pitch and loudness as well as irregular articulatory breakdown in the precision of his articulation. Based on these findings, the neurologist diagnosed Troy with this neurological condition: Group of answer choices Multiple sclerosis Huntington's chorea Muscular dystrophy Myasthenia gravis Friedreich's ataxia Autism