The building restriction along rivers at the 50-year floodmark is a safety measure. Which of the following is true about it? A. It creates a disturbance of the natural flow of rivers, as it destroys natural drainage patterns. B. When the flow of r

D. All the options All the statements provided are true regarding the impact of building restrictions along rivers at the 50-year floodmark and the consequences that can arise from altering natural river flow and vegetation. These points highlight the importance of maintaining natural ecosystems around rivers to support biodiversity, groundwater replenishment, and to mitigate flooding risks.