A nurse is providing education to a client during her first prenatal visit.Which of the following should the nurse include in the teaching to decrease the risk of preterm labor?

Maintain folic acid intake of 4 mcg per day.

Increase fluids to 8-10 (8 oz) glasses per day.

Consume the recommended daily allowance of vitamin C (85 mg).

Increase caloric intake by 500 calories per day.