A solution is a

A. combination of isotopes.

B. chemical reaction.

C. mixture in which the substances are evenly spread out.

D. mixture in which undissolved substances do not settle out.

Respuesta :

(C) because when substances dissolve in it completely, it is called solution which has a even colour all over and no things settled down. But when we see undissolved things that do not settle down, it is called an colloid which make the visibility through it a little opaque and not clear like in the solution