What is the primary concern associated with the construction of coastal control structures like sea walls and groins
A. These structures are praised for their ability to enhance speech aesthetics and increase tourist attraction without negative impact
B. Coastal control structures are highly effective and all situations and are recommended as the first line of defense against rising sea levels
C. The main concern is their high cost, while they have minimal impact on the actual protection of coastline from erosion
D. Wow designed to protect coastline these structures can alter natural sediment dynamics leading to increase erosion in other areas and potentially undermining their protective capabilities