A 37-year-old woman in her 32nd wk of gestation (G2P1) presents with a seizure. She has been healthy and does not smoke cigarettes, drink alcohol, or use illicit drugs. She has been poorly compliant in receiving her prenatal care. Physical examination reveals a blood pressure of 150/95 mm Hg. The patient’s face and hands appear edematous. Other than the patient being postictal (confused and disoriented after the seizure), the neurologic examination is normal. The urinalysis reveals proteinuria. The rest of the patient’s laboratory data is normal. Which of the following is the most likely diagnosis?