Here is the data a scientist collected from a sample of river water after filtering: The data support which of the following descriptions of the sample?
A.
It’s a mixture because dissolved ions in the water pass through the filter paper

B.
The substance is pure because the solid particles cannot pass through the filter paper

C.
It’s a mixture because solid particles are separated from the river water.

D.
It is a pure substance because the river water is composed of free elements