The correct answer is: B. personal area network (PAN)
A personal area network (PAN) is a wireless telecommunications network for connecting devices within a very short range. PANs are typically used to connect personal devices such as laptops, smartphones, and tablets to each other or to a larger network.
A wireless wide area network (WWAN) is a network that covers a large geographic area, such as a city or country. WWANs are typically used to provide mobile Internet access to laptops, smartphones, and other mobile devices.
A wireless local area network (WLAN) is a network that covers a small geographic area, such as a home or office. WLANs are typically used to provide Internet access to laptops, smartphones, and other devices that are within range of a wireless access point.
A sensor network is a network of sensors that are used to collect data about the environment. Sensor networks are typically used for monitoring and control applications.