The Town of Grand Isle, Louisiana Is Built on a Barrier

The town of Grand Isle, Louisiana is built on a barrier island that has been shrinking for decades. They have tried the following approaches to protect the island from coastal erosion. Which of these is not a feature intended to simulate natural barrier island beach processes?

A) construction of artificial dunes and planting coastal grasses on the dunes
B) placement of groins
C) placement of large concrete donuts on the seabed in the surf zone
D) offshore sand dredging and deposition to rebuild the beach