Problem: A dam is built on a river, forming a reservoir. Over time, this likely will cause: Group of answer choices Rapid erosion of sand, both upstream of the reservoir, and downstream of the dam. Sedimentation to bury farmer's fields upstream of the reservoir, and erosion of sand downstream of the dam. Sedimentation to bury farmer's fields upstream of the reservoir, and sedimentation of sand downstream of the dam. Nothing to happen; dams don't matter to upstream or downstream conditions. Ohio State students to take a leak in a sinkhole behind the Nittany Mall, east of Penn State's University Park campus. Need Assignment Help?