Final answer:
The unrefined food in the given options is white bread.
Step-by-step explanation:
The unrefined food in the given options is c) White bread. Unrefined foods are those that have undergone minimal processing and still retain most of their natural nutrients. White bread is made from refined flour which undergoes a process that removes the bran and germ, resulting in a product that is less nutritious compared to whole grain bread. On the other hand, oatmeal, buttermilk pancakes, and cornflakes cereal are examples of refined foods as they have undergone processing that removes some of their original nutrients.