The correct answer is D. Gravel powder.
Good quality sand is never obtained from gravel powder because it is too coarse and angular. Sand should be fine and smooth to be of good quality. It should also be free of impurities, such as clay and silt.
Sand from rivers and lakes is often of good quality because it is transported by water and is therefore well-rounded and free of impurities. Sand from the sea is also often of good quality, but it can be more coarse and angular than sand from rivers and lakes.
Gravel powder is a type of sand that is made up of very small pieces of gravel. It is often used in construction and landscaping. However, it is not considered to be good quality sand because it is too coarse and angular.