Charles c. is a 65-year-old executive who is very overweight and has recently been diagnosed with high blood pressure. he has just completed a class on the principles of the dash (dietary approaches to stop hypertension) diet and has set a goal to lower his intake of fat and sodium and to increase his intake of calcium and potassium-rich foods. mr. c. has met a friend for lunch at his favorite restaurant that features pizza, salads, soups, and sandwiches.