A 16-year-old boy with a 3-year history of juvenile myoclonic epilepsy, currently controlled on monotherapy with valproic acid, presents to the emergency department after experiencing 3 generalized tonic-clonic seizures over a 4-hour period. He is alert and oriented between seizures with spontaneous respirations. Vital signs are: BP 128/82 mmHg, HR 102/min, RR 18/min, temperature 37.2°C, SpO2 98% on room air. Serum valproic acid concentration is 65 mcg/mL (therapeutic range 50-100 mcg/mL). The patient denies recent medication non-compliance, head trauma, or prodromal symptoms. Neurologic examination between seizures is non-focal. Which of the following is the most appropriate immediate management?

1. A)Administer lorazepam 0.1 mg/kg IV and prepare for intubation and ICU admission
2. B)Administer lorazepam 0.1 mg/kg IV and initiate phenytoin or fosphenytoin loadingGABARITO
3. C)Obtain non-contrast head CT and lumbar puncture to exclude structural and infectious etiologies
4. D)Discontinue valproic acid immediately and initiate levetiracetam at a therapeutic dose
5. E)Monitor closely in the emergency department without additional medication pending repeat valproic acid level