Mаriа Sаntоs is a 32-year-оld G2P1 wоman at 26 weeks gestation who presents to the prenatal clinic for routine care. Her BMI is 31 kg/m². Her first pregnancy was complicated by a 9-pound baby delivered via cesarean section. She reports her mother has type 2 diabetes. Today, she underwent a 1-hour 50-g glucose tolerance test (GTT) as part of routine screening, and her result was 148 mg/dL. Based on Maria's 1-hour 50-g GLT result of 148 mg/dL, what is the next appropriate step in her care?