Final answer:
To increase daily intake of complex carbohydrates, it is most appropriate to increase intake of whole grains, such as whole wheat bread, whole wheat pasta, and brown rice.
Step-by-step explanation:
The physician advised the 28-year-old patient to increase his daily intake of complex carbohydrates. The most appropriate foods to increase intake of in order to do this would be whole grains. Whole grains, such as whole wheat bread, whole wheat pasta, and brown rice, are good sources of complex carbohydrates. They provide fiber, B vitamins, minerals, and protein.