For a certain reaction X, `rate = 0.7Z_(AB)e^(-(EA)/(RT))`.
It is seen that for another reaction, Y, rate = `Z_(AB)e^(-(EA)/(RT))`.
Based on the above, what can be said about reactions X and Y?

Options

A. Both the reactions involve complex molecules.
B. Both the reactions involve simple molecules or atomic species.
C. Reaction X involves simple molecules or atomic species, while reaction Y involves complex molecules.
D. Reaction X involves complex molecules, while reaction Y involves simple molecules or atomic species.