Multi-choice problem: Continue writing the next sentence in this paragraph:

How to make a quick healthy breakfast 
Always include a source of protein. 
One important component of your breakfast should be protein. Studies have shown that those people who had a decent amount of protein at their breakfast stayed satisfied longer and were able to maintain a healthy weight.

Select from the following.
 (a). Recommended sources of protein are grains, meats, beans, fish, and even legumes. You should choose low-fat versions of your favorite foods and only leave eggs, milk and yogurt on your plate.;
 (b). You should also include plenty of vegetables in your breakfast to keep you full longer. For instance, you may have boiled lettuce in water for breakfast, or you may have cooked oatmeal for lunch.;
 (c). To ensure you're eating enough protein at breakfast, aim for about 1 serving of a protein-rich food. This is about 3-4 oz or about 1/2 cup.;
 (d). Having a source of protein is essential for your diet, but it's also important to help prevent weight gain from eating too many carbohydrates at breakfast and take note that your body is actually telling you that it needs more. Protein provides the nutrients you need for a wide variety of functions at your body's' peak levels.;
(c).