Final answer:
Customers are accepting less personalized service for the convenience of call centers. The availability of choices and the consequent unreliability of some new service providers versus established ones such as AT&T are highlighted.
Step-by-step explanation:
The correct answer to the student's question is c) less. The sentence should read, "Customers are accepting less one-on-one service for the increased convenience of being able to talk to a call center." This reflects the trade-off that customers are making between personalized service and the convenience offered by more impersonal, but readily available, call center support.
Various factors such as caller ID, the decline of landlines, and more hectic personal schedules have contributed to this trend. Additionally, while more choice in service providers offers benefits like cheaper phone calls and better-quality data transmission, it also leads to difficult decisions and a recognition that some providers may be less reliable than the traditional ones like AT&T.