Arrange the following steps in the correct order for the process of addition polymerization: A. Initiation B. Propagation C. Termination D. Monomer activation

In addition polymerization, the first step is Initiation (A), where a catalyst or initiator creates a reactive species such as a free radical. Next comes Monomer Activation (D), in which the reactive species adds to a monomer, forming a new radical center on the monomer. Then Propagation (B) occurs, where the growing radical chain repeatedly adds more monomers, extending the polymer chain. Finally, Termination (C) ends the chain growth by combining two radicals or otherwise deactivating the reactive end. This sequence—Initiation, Monomer activation, Propagation, Termination—ensures a controlled buildup of polymer chains.