The correct answer is D. Interactive Voice Response (IVR).
IVR is a system that allows users to interact with a computer system using voice commands. It is often used in call centers to automate tasks such as routing calls to the appropriate department or providing customer support. IVR can also be used to access information, such as account balances or weather forecasts.
Pervasive computing is a term used to describe the increasing integration of computers into everyday life. It is often used in conjunction with the term “ubiquitous computing,” which refers to the idea that computers will eventually be so pervasive that they will be invisible to the user.
A real-time location system (RTLS) is a system that tracks the location of objects in real time. It is often used in logistics and asset tracking applications.
A personal area network (PAN) is a small computer network that connects devices within a person’s immediate vicinity. It is often used to connect devices such as laptops, smartphones, and tablets.