Select the letter of the correct answer. The Article primarily discusses __________. Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected A. how people began using wheels for transportation by putting a pole through a wheel about 300 years after the wheel was invented B. how the wheel, which was invented as a potter's tool, evolved to be used in transportation, agriculture, irrigation, and more over the course of 5,000 years C. how people have invented different types of wheels for agricultural use that can be powered by people, animals, wind, or flowing water D. how around 3500 BCE, potters in ancient Mesopotamia created the first wheel, which was used to spin clay to make it easier to shape their plates, bowls, and sculptures SUBMIT