question: Q:A 25-year-old man is brought to the emergency department by paramedics with a seizure lasting over 30 minutes. The patient's neighbors found him outside his apartment with all four limbs flailing and not responding to his name. No significant past medical history. On physical examination, the patient continues to be unresponsive and slightly cyanotic with irregular breathing. His teeth are clenched tightly. Intravenous glucose and an anticonvulsant medication are administered. Which of the following is the mechanism of action of the drug that was most likely administered to stop this patient’s seizure?? 
  {'A': 'Prolongation of chloride channel opening', 'B': 'Increase in frequency of chloride channel opening', 'C': 'Blockage of voltage-gated calcium channels', 'D': 'Inactivation of sodium channels', 'E': 'Blockage of T-type calcium'},