The correct answer is: B. Bluetooth
Bluetooth is a wireless technology that allows electronic devices to communicate with each other over short distances. It is used in a wide range of devices, including smartphones, laptops, and speakers. Bluetooth is a very convenient way to connect devices, as it does not require any cables.
USB is a universal serial bus. It is a standard connection interface for connecting peripheral devices to computers. USB is used to connect a wide range of devices, including keyboards, mice, printers, and external hard drives.
A modem is a device that modulates and demodulates signals. It is used to connect computers to the internet. Modems are typically used to connect to dial-up internet, but they can also be used to connect to broadband internet.
Wi-Fi is a wireless networking technology that allows devices to connect to the internet. Wi-Fi is used in a wide range of devices, including smartphones, laptops, and tablets. Wi-Fi is a very convenient way to connect to the internet, as it does not require any cables.
E. None of these is not the correct answer.