Scenаriо Questiоns 17-19: Setting: Inpаtient Rehаbilitatiоn Gender: Male Age: 45 years Current Condition: Guillain Barre syndrome diagnosed 10 days ago Medical History: 7-day hospitalization; previous level of function includes independent ambulation in all settings Other Information: Patient uses manual wheelchair with adaptive handrims; spouse trained during acute care hospitalization to assist the patient with bed mobility and transfers with a slide board PT Examination: poor (2/5) strength in bilateral LEs; absent deep tendon reflexes; LE parasthesia; mod A 1 bed mobility and transfers PT Plan of Care: functional bed mobility; sitting balance; wheelchair mobility; gait when appropriate; patient and caregiver education Which of the following etiologies would be most common for this condition?