Which of the following options will generally NOT speed up the shipping process?

Using stamps generally does not speed up the shipping process because it does not provide any priority handling or expedited delivery options. Stamps are standard postage that simply pays for the service without offering additional benefits like tracking or faster delivery times. In contrast, express mail services, expedited prepaid labels, and postage meters are designed to enhance the shipping experience by offering quicker delivery timelines and priority handling. These options typically include features that help ensure packages are processed and delivered faster than those sent with regular stamps. Thus, the primary reason for the chosen response lies in the inherent limitations of using stamps compared to the other available services.