When a client wants to include whole-grain foods in his or her daily intake, a fitness professional could suggest
a. fresh or frozen vegetables.
b. low-fat dairy products.
c. brown rice, oatmeal, and barley.
d. fresh fruit and fruit juice.

C-  because brown rice,oatmeal, and barley .Brown rice is whole grain rice, with the outer hull removed; white rice is the same grain after further milling and polishing to remove the bran layer and germ. Brown rice has a mild, nutty flavor, and is chewier and more nutritious than white rice. 
Oatmeal is made of oat groats (i.e. grains) that have either been ground, crushed, steel-cut, or rolled. Ground oats are also called "white oats". Steel-cut oats are known as "coarse oatmeal" or "Irish oatmeal" or "pinhead oats". The term "oatmeal" is also used in the U.S. and parts of Canada to mean oat porridge.Barley is a wonderfully versatile cereal grain with a rich nutlike  flavor and an appealing chewy, pasta-like consistency. Its appearance resembles wheat berries, although it is slightly lighter in color. Sprouted barley is naturally high in maltose, a sugar that serves as the basis for both malt syrup sweetener. When fermented, barley is used as an ingredient in beer and other alcoholic beverages.