Which statement best describes why the rate of reaction will increase if you increase the concentration of a solution? a) a higher concentration solution will only react at a higher temperature. b) when the concentration of the solution increases, the amount of the other reactant also increases. c) the higher number of molecules increases the number of collisions that will occur with the reactants. d) if the concentration increases, the number of solution molecules decreases which gives more room for the reaction to occur.