Base your answers to questions on the cross section and data table below and on your knowledge of Earth science. The cross section shows the profile of a stream that is flowing down a valley from its source. Points A through E represent locations in the stream. The data table shows the average stream velocity at each location. The volume of water in the stream remains the same at all locations. The average stream velocity at each location is controlled primarily by the....A. elevation above sea level B. sediment carried by the streamC. slope of the landD. distance from the stream’s source