All of the following devices are connected to the internet of thing except _______?
A. A smart thermostat that allows you to remotely control your home’s temperature through a mobile app
B. A digital baby monitor that allows you to stream video and audio of your nursery from the internet
C. A wearable device that measures your physical activity and allows you to track your activity through a mobile app
D. An AM/FM radio without any Bluetooth or internet connection capabilities