The client reports a burning sensation in the mid-epigastric area after eating and occasionally experiences a feeling of warm fluid moving up the throat with a sour taste in the mouth. The healthcare provider makes a medical diagnosis of gastroesophageal reflux disease (GERD) and suggests that the client try lifestyle modifications. Which dietary interventions and/or lifestyle modifications will the nurse reinforce because they are essential for clients with GERD? (Select all that apply.)