Final answer:
The cookie made from rolled flat oats is the oatmeal option (b) cookie. Oatmeal cookies include ingredients like sugar, flour, eggs, and rolled oats, offering a fibrous treat.
Step-by-step explanation:
The type of cookie made from oats that are rolled flat is B) Oatmeal cookies. Oatmeal cookies often include ingredients such as sugar, flour, eggs, butter, and of course, rolled oats. They may also contain additional elements like raisins, chocolate chips, or nuts, depending on the recipe.
These hearty cookies are known not only for their delicious taste but also for providing a more fibrous option compared to other cookies, thanks to the inclusion of oats.