In a hypothetical chemical reaction, a complex organic molecule, Q, undergoes a unimolecular decomposition to form three different products: R, S, and T. The reaction follows first-order kinetics. It's observed that the formation of product R involves a significant primary kinetic isotope effect (KIE), while the formations of products S and T do not. Based on this information, which of the following statements is most likely true regarding the reaction mechanism? A. The rate-determining step of the reaction involves the breaking of a bond to a hydrogen atom in Q, leading to the formation of R. B. The formation of all three products, R, S, and T, proceeds through a common intermediate which then decomposes in three different pathways. C. The reaction involves a synchronous concerted mechanism, where the formations of R, S, and T occur simultaneously. D. The formation of products S and T is favored over R due to the absence of a kinetic isotope effect in their pathways. don't use chat gpt.