Final answer:
For a 27-year-old woman with severe preeclampsia at 36 weeks gestation, the target diastolic blood pressure should be 80-85 mm Hg, which maintains sufficient blood flow and reduces the risks associated with high blood pressure.
Step-by-step explanation:
The goal for the management of severe preeclampsia in a pregnant woman is to lower high blood pressure in a controlled manner. While the recommended blood pressure is typically less than 140/90 mmHg, it is important not to lower the diastolic blood pressure too much to ensure adequate perfusion to the placenta. The diastolic blood pressure should be lowered to a safe level but not below 60 mmHg to avoid potential complications. Therefore, the target diastolic blood pressure should be 80-85 mm Hg (answer D), which is considered optimal for reducing risks associated with high blood pressure while maintaining sufficient blood flow.