How do solutions differ from other mixtures?

A.

Solutions are heterogeneous mixtures.

B.

Solutions do not contain more than one element.

C.

Each component of a solution can be seen clearly.

D.

One component of a solution dissolves in another.

I think the correct answer from the choices listed above is option D. Solutions differ from other mixtures in sense that one component of a solution dissolves in another. It forms a homogeneous mixture with the solvent which means it will have uniform properties. Hope this answers the question.