Which of the following is not true of the Internet of Things $($IoT$)?$

A$.$ Most IoT devices connect to the Internet, making them accessible anywhere in the world.

B$.$ IoT is a network of devices that are all connected via networking.

C$.$ IoT smart devices can include lights, vehicles, and wearable devices such as exercise monitors.

D$.$ Most IoT devices use wired network connections to join the local network.