a(n) is a website that allows multiple users to contribute content and edit existing content.
a.
wiki
b.
e-zine
c.
search engine
d.
blog

a)wiki

Explanation: Wiki , which is operated by the wiki software ,is a website that provides the knowledge content to the various users.The site content is written in the basic form of language using the markup language.The text present in the content can be change accordingly.

Other given options are incorrect a e-zine is a type of electronic magazine on the computer system,blog is known as the journal in online mode,and search engine is used for searching any particular component on system. Thus the correct option is option(a).

answer unified communications;