You are flying along the coast, and you observe a sort of dam or wall, called a groin, sticking out from the coast. Sediment has piled up on one side of the groin, with erosion on the other side. You can reasonably infer that: Group of answer choices Before the groin was built, the beach was building out rapidly, so the landowners built the groin to make their beach smaller. The groin of the beach is attached to the pelvis of the beach at the elbow of Cape Cod, making for some strange scientific anatomy. Before the groin was built, sediment transport in the longshore drift was dominantly from the side with the erosion to the side with the sediment deposit, and the groin has made this transport much faster. Before the groin was built, sediment transport in the longshore drift was dominantly from the side with the sediment deposit to the side with the erosion, and the groin has interrupted some of this transport. Before the groin was built, the beach was perfectly stable, so the landowners built the groin primarily to cause a longshore drift to begin so that the beach would move.