Why does increasing the concentrations of two reactants in solution make a
reaction proceed more quickly?
A. When the particles have more room to move, they can collide in a
better orientation.
B. Increasing the concentrations of reactants reduces the activation
energy of the reaction.
C. When there are more particles in the same space, they collide
more often.
D. Increasing the concentrations of reactants increases the speed of
the particles.