Final answer:
Smart devices such as smart TVs and home appliances, among others, connect to wireless modems using WiFi, which operates using microwaves in the 2.4 GHz to 5.0 GHz range.Thus (option D) is right answer.
Step-by-step explanation:
Besides a smartphone, tablet, or laptop, smart devices (which include smart TVs, smart home devices like thermostats and lights, security cameras, and various home appliances) can connect to a wireless modem.
Wireless modems use microwaves in the 2.4 GHz to 5.0 GHz range for WiFi connectivity, which allows devices to connect wirelessly to the internet.
This technology has evolved significantly since the origins of the internet, with modems becoming faster, and internet access becoming more accessible and convenient with the improvement of wireless technologies. Thus (option D) is right answer.