The correct answer is option B.
A newsgroup is an interaction centre on internet site which include exchange of opinions and information between individuals or group of people.
These forums are accessible by Users. Other options such as podcast, surfers, and an up loader are wrong because a podcast is a mobile device application downloadable from the net which can be used to listen to audio or video files.
The uploader is someone that shares information or files from one computer to another usually a larger computer. A surfer is someone browsing for specific information and moves from one web page to another using the hyperlink in an internet browser.
A network is highly needed during these modern times. People rely on computers in order to type correspondence, keep data and to send information to different people. If a company wanted to update information so that all employees could see it and change it when needed, their computers would be networked. This means that they need the set of computers to be linked so that they can share resources together.
For example, if Bill needs to keep a spreadsheet or information about the sales in the company, but the information needs to be instantly changed when a new sales happens, then the network would be needed so that everyone in every location of the building or buildings has access to this program.