Identify the symptoms associated with acute onset cranial neuropathies and descending weakness. What additional features may be observed?
a. Unilateral facial weakness; Audiometry
b. Blurred vision; Fixed pupils; Urinary retention; Constipation
c. Muscle spasms; Hyperreflexia; EEG
d. Episodic headaches; Lumbar puncture for cerebrospinal fluid analysis