Lucy is creating a presentation about the importance of planting sea oats to decrease erosion of dunes on the coast of Florida. Which type of digital media would be an effective addition to her presentation?

A)A chart that tracks the number of sea oats that are planted each year
B)A diagram of the parts of a sea oat
C)An image that shows the dunes before and after the sea oats were planted
D)A map of where sea oats were planted on certain coasts