In managing its service operations more efficiently, which measure would best help a bank enhance its customer service, in alignment with process innovation principles? a$)$ The bank extends its service hours and introduces a flexible scheduling system for staff to ensure service availability during peak times. b$)$ The bank trains its employees to efficiently cross$-$sell products during transactions, using targeted customer data to minimize increases in transaction time. c$)$ The bank implements an advanced queue management system that uses real$-$time data analytics to decrease wait times and optimize employee allocation. d$)$ The bank increases the number of service counters and integrates a digital appointment system to manage customer flow more effectively.