During the day, sunlight heats up rocks on the Earth's surface. After the Sun sets, the rocks cool off. This pattern of heating and cooling causes the rocks to swell and shrink just a little each day. Over time, how could this swelling and shrinking of rocks change a landform, such as a mountain? OA. It could help break up the rocks on the landform's surface. OB. It could change the color of the landform's rocks. OC. It could make the landform look much prettier. OD. It could melt the landform's rocks.​