Which Statement Best Describes Chronic Hypertension

Which statement best describes chronic hypertension?

A) Chronic hypertension is defined as hypertension that begins during pregnancy and lasts for the duration of the pregnancy.
B) Chronic hypertension is considered severe when the systolic BP is higher than 140 mm Hg or the diastolic BP is higher than 90 mm Hg.
C) Chronic hypertension is general hypertension plus proteinuria.
D) Chronic hypertension can occur independently of or simultaneously with preeclampsia.