A patient reports persistent cravings for ice and clay and has low hemoglobin on screening. Which action is most appropriate?

Prescribe a high-dose zinc supplement without further workup because zinc deficiency is the primary cause of pica

Refer for medical evaluation and iron studies because pica (especially pagophagia/soil ingestion) can be associated with iron deficiency anemia and requires investigation and treatment

Reassure her that cravings are normal and no testing or treatment is needed unless she develops severe symptoms

Advise immediate cessation of all prenatal vitamins because they are the likely cause of cravings