A 22-year-old primigravida with type 1 diabetes presents at 12 weeks for her prenatal visit. She asks what she can do to lower her risk of preeclampsia. Which teaching should the nurse provide?

Increase salt intake after 20 weeks of pregnancy

Start folic acid supplementation in the third trimester

Begin low-dose aspirin daily before 16 weeks of gestation

Avoid all physical activity throughout pregnancy