Which of the following is true about IoT?

Question $9$ options:

IoT refers to both the communication among devices and the devices themselves

IoT objects examples include $$ cars, video game consoles, digital cameras, microwave ovens, thermostats, wearables, hair dryers, and garage door openers

IoT devices are designed to reduce energy, make life more convenient, make processes more efficient, and improve safety

All of the above