Why do membrane bounded organelles facilitate faster chemical reactions

The choices can be found elsewhere and as follows:

a. membranes lower the activation energy of biochemical reactions.

b. reactants are within close proximity to each other.

c. membrane-bounded organelles act as catalysts for biochemical reactions.

d. reactants move faster within membrane-bounded organelles.

e. reactants are less likely to encounter each other within membrane-bounded organelles.

The correct answer is option C. Membrane bounded organelles facilitate faster chemical reactions because it act as catalysts for biochemical reactions. Hope this answers the question.