The lowest point in a drainage basin would be:
1) At the mouth of the river (where it flows into a larger tributary or it flows
into the ocean)
2) Near the center of the drainage basin, at the confluence of two smaller
channels
3) Somewhere along the divide that separates the drainage basin from adjacent
drainage basins
4) Drainage basins are flat so all areas are the same elevation (i.e., no high
points exist in a drainage basin)
5) Both B and D