36. Enzymes ( E ) can catalyze reactions through the formation of an enzyme-substrate intermediate (ES). Then ES decomposes into product (P) along with the release of free E. The total enzyme concentration is constant throughout the process, where $[\mathrm{E}]_{\mathrm{t}} = [\mathrm{E}] + [\mathrm{ES}]$. The mechanism can be expressed below: $$ E + S \underset{k_{-1}}{\overset{k_1}{\rightleftharpoons}} ES \underset{k_{-2}}{\overset{k_2}{\rightleftharpoons}} E + P $$ Assuming the decomposition of ES is irreversible, and the concentration of ES is small and remains steady during the whole process, what is the maximum rate $(r_{\max})$ of this reaction?
(A) $r_{\max} = k_1[\mathrm{E}]_{\mathrm{t}}$
(B) $r_{\max} = k_2[\mathrm{E}]_{\mathrm{t}}$
(C) $r_{\max} = k_1[\mathrm{E}][\mathrm{S}]$
(D) $r_{\max} = k_2[\mathrm{ES}]$
(E) $r_{\max} = \dfrac{k_1k_2}{k_{-1}}[\mathrm{ES}]$