Smartphones have changed the ways of relationships, business and communication, and are an essential tool today. Manufacturing companies are looking to innovate their devices in order to provide better customer service and boost sales.
In this context, smartphne systems, DVD's and gaming systems may even reduce their price over time, but in the long term.
In the case of smartphones, companies launch a new device each year, with some extra technology. However, the newly launched devices are very costly and sometimes do not bring such a significant innovation. In addition, devices launched before the last release do not become exactly obsolete. Thus, although cost-benefit analysis is relative, varying according to each customer, it can be said that it is worth buying a device a generation or two earlier than the launcher, as they are also relatively new.
Therefore, the second answer is correct (B).
