Which of the Following Describes a Main Mechanism of Enzymes

Which of the following describes a main mechanism of enzymes?

A) removing reactants from a solution in a set ratio that enhances the chances of the remaining individual reactants interacting with each other
B) forcing the reactants into an altered environment, which in turn creates a change in the free energy of the reactants relative to the products
C) increasing the probability that the reactants will come into close proximity to each other in the proper orientation for forming the transition state molecule
D) altering the equilibrium point of a particular reaction to favour the formation of products