Final answer:
A broadband internet connection between a computer and a modem can be established using an Ethernet cable or Wi-Fi. Bluetooth is used for short-range connections and USB for peripheral devices, thus Ethernet and Wi-Fi are the correct options for broadband.
Step-by-step explanation:
A broadband internet connection between a computer and modem can be established using different technologies. The correct answer to the question is which of these can be used to establish a broadband connection. Options b) Ethernet cable and d) Wi-Fi are both valid methods for connecting a computer to a modem for broadband internet access.
An Ethernet cable is a wired connection providing fast and stable internet, while Wi-Fi refers to a wireless connection that uses microwaves in the 2.4 GHz to 5 GHz range to connect devices like computers and cell phones to the internet through a wireless router. While a) Bluetooth is also a wireless technology, it operates in the same frequency range as Wi-Fi but is mainly used for connecting devices over short distances, such as a phone to a headset, and is generally not used for broadband internet connections.
Option c) USB is a type of connection that can be used for various purposes, including networking, but is more commonly associated with connecting peripheral devices like keyboards, mice, or external storage to a computer.